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question:The probability that it will rain in a certain city on any given day in June is 0.25. What is the probability that it will rain on at least 2 out of 5 consecutive days in June in that city?
answer:To solve this problem, we'll calculate the probability of the complementary event (raining on 0 or 1 days) and subtract it from 1. This approach simplifies the problem, as calculating the direct probability of raining on at least 2 days would require us to consider multiple cases (raining on exactly 2 days, exactly 3 days, exactly 4 days, and exactly 5 days). The probability of raining on a given day is 0.25, so the probability of not raining on a given day is 1 - 0.25 = 0.75. First, let's calculate the probability of raining on 0 days (i.e., not raining on all 5 days): (0.75)^5 = 0.2373. Next, we'll calculate the probability of raining on exactly 1 day out of 5. There are 5 ways to choose 1 rainy day from 5 consecutive days. The probability of raining on exactly 1 day is C(5, 1) * (0.25)^1 * (0.75)^4 = 5 * 0.25 * 0.3164 = 0.3955. Now, we add the probabilities of raining on 0 days and exactly 1 day: 0.2373 + 0.3955 = 0.6328. Finally, the probability of raining on at least 2 out of 5 consecutive days is 1 minus the probability of raining on 0 or 1 days: 1 - 0.6328 = 0.3672. Therefore, the probability that it will rain on at least 2 out of 5 consecutive days in June in that city is approximately 36.72%.
question:The function 'f' is a quadratic function. The graph of the equation y = f(x) is a parabola that opens upwards with vertex at (-2,-3). What is the general equation of this quadratic function of the form f(x) = ax^2 + bx + c.
answer:Given that the vertex of the parabola is (-2, -3), the quadratic function can be written in vertex form as f(x) = a(x + 2)^2 - 3. Since the parabola opens upwards, the coefficient 'a' must be positive. To express f(x) in the form ax^2 + bx + c, we expand the squared term: f(x) = a(x^2 + 4x + 4) - 3. Now, distribute the coefficient 'a': f(x) = ax^2 + 4ax + 4a - 3. Since 'a' is a constant, we can rewrite the equation as f(x) = ax^2 + (4a)x + (4a - 3). Without additional information, we cannot determine the exact value of 'a'. However, this expression represents the general equation of the quadratic function with the given vertex and an upward-opening parabola. Note that any positive value of 'a' will give a parabola that opens upwards and has the vertex (-2, -3), but the steepness of the curve will vary depending on the specific value of 'a'.
question:By . Daily Mail Reporter . PUBLISHED: . 16:22 EST, 4 March 2014 . | . UPDATED: . 17:25 EST, 4 March 2014 . Following the huge success of 12 Years A Slave and renewed interest in the life of the story's author Solomon Northup, the New York Times has published a correction after misspelling his name in an article first published 161 years ago. On January 20, 1853, the newspaper published a story about Northup’s remarkable and traumatic experience. Called The Kidnapping Case, the subhead referred to the 'narrative of the seizure and recovery of Solomon Northrup' - mistakenly adding an extra r - while the article itself repeatedly mis-spelt his surname as 'Northrop'. On Tuesday, the Times finally published an apology in the Corrections section of the newspaper and online, which explained that ‘the errors came to light on Monday after a Twitter user pointed out the article in The Times archives.’ Scroll down for video . Solomon Northup's autobiography 12 Years A Slave was turned into a Hollywood movie in 2013, left, while an engraving of the man himself, right, featured inside his book which was published in 1853 . On January 20, 1853, the New York Times published an article about Solomon Northup's traumatic experience, but spelt his name incorrectly in both the headline and story . Director Steve McQueen's film adaptation of Northup's memoir won three Oscars on Sunday night . That Twitter user was Rebecca Skloot, the author of The Immortal Life Of Henrietta Lacks. After the correction ran, she tweeted, ‘The irony, of course, is that I'm a terrible speller and proofreader.’ The original article, published the same year as Northup’s book 12 Years A Slave, told a summary account of how this free African-American man had been kidnapped, sold into slavery and forced to endure years of terrible hardship and suffering. Director Steve McQueen’s film adaptation of Northup’s memoir won three Oscars on Sunday night – Best Film, Best Actress In A Supporting Role for Lupita Nyong’o and Best Adapted Screenplay for John Ridley. It was Twitter user and author Rebecca Skloot, right, who alerted the Times to the 161-year-old error . On Tuesday, the New York Times finally published an apology over the mistake in the Corrections section of the newspaper and online . Director Steve McQueen accepts the Best Picture award for 12 Years A Slave onstage during the Oscars in Hollywood on Sunday .
answer:The New York Times has issued a correction for a 161-year-old article that misspelled Solomon Northup's name, the author of 12 Years a Slave. The original article, published on January 20, 1853, detailed Northup's kidnapping and enslavement, but incorrectly spelled his name as Northrup in both the headline and the text. The error was brought to light by author Rebecca Skloot, who tweeted about the archived article. The correction was published in the newspaper's Corrections section and online on March 4, 2014. The renewed interest in Northup's story stems from the success of the film adaptation of his memoir, which won three Oscars, including Best Picture, on March 2, 2014.
question:Harry is ordering pizza from Pizzatown, which offers three sizes of pizza: small, medium, and large. A small pizza costs 10, a medium costs 12, and a large costs 14. Harry decides to order 1 small pizza, 2 medium pizzas, and 1 large pizza. In addition, Pizzatown offers extra toppings for an additional cost: 1.50 per topping for small pizzas, 1.75 per topping for medium pizzas, and 2 per topping for large pizzas. Harry orders 2 toppings on the small pizza, 3 toppings on each of the medium pizzas, and 4 toppings on the large pizza. Moreover, Harry decides to include a side dish composed of 10 garlic knots priced at 3 per 5 knots and a 2-liter soda priced at 2. Pizzatown is currently offering a 10% discount on orders exceeding 35, but the discount only applies to the cost of the pizzas. The local tax rate for prepared food is 8%. After calculating the subtotal, Harry intends to add a 25% tip on the final amount, including tax. What is the total cost that Harry needs to pay for his order?
answer:First, let's calculate the cost of the pizzas without toppings: 1 small pizza = 10 2 medium pizzas = 2 * 12 = 24 1 large pizza = 14 Total cost for pizzas without toppings = 10 + 24 + 14 = 48 Now, let's calculate the cost of the toppings: Small pizza toppings = 2 * 1.50 = 3 Medium pizza toppings = 2 * (3 * 1.75) = 2 * 5.25 = 10.50 Large pizza toppings = 4 * 2 = 8 Total cost for toppings = 3 + 10.50 + 8 = 21.50 Adding the cost of the pizzas and toppings together: Total cost for pizzas with toppings = 48 + 21.50 = 69.50 Since the order exceeds 35, Harry gets a 10% discount on the cost of the pizzas (not including toppings): Discount on pizzas = 10% of 48 = 4.80 Subtracting the discount from the total cost of pizzas with toppings: Adjusted total for pizzas with toppings = 69.50 - 4.80 = 64.70 Now, let's add the cost of the side dishes: 10 garlic knots = 2 * 3 = 6 (since it's 3 per 5 knots) 2-liter soda = 2 Total cost for side dishes = 6 + 2 = 8 Adding the side dishes to the adjusted total for pizzas with toppings: Subtotal = 64.70 + 8 = 72.70 Now, we calculate the tax on the subtotal: Tax = 8% of 72.70 = 0.08 * 72.70 = 5.816 (rounded to 5.82) Adding the tax to the subtotal: Total with tax = 72.70 + 5.82 = 78.52 Finally, Harry wants to add a 25% tip on the final amount including tax: Tip = 25% of 78.52 = 0.25 * 78.52 = 19.63 (rounded to the nearest cent) Adding the tip to the total with tax: Total cost with tip = 78.52 + 19.63 = 98.15 Therefore, the total cost that Harry needs to pay for his order is boxed{98.15} .