Assume that the masses of adult men can be modelled by the Normal distribution with mean 75 kg and standard deviation 5 kg.
The probability that an adult man, chosen at random, will have a mass greater
than 77.5 kg is
(4 d. p.)
The probability that an adult man, chosen at random, will have a mass between
76.6 kg and 83.5 kg is
(4 d. p.)
62% of adult men have a mass greater than
kg (1 d. p.)
The interquartile range for the masses of adult men is
kg (1 d. p.)

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0

Someone answer asap for ! a discount store’s prices are 25% lower than department store prices. the function c(x) = 0.75x can be used to determine the cost c, in dollars, of an item, where x is the department store price, in dollars. if the item has not sold in one month, the discount store takes an additional 20% off the discounted price and an additional $5 off the total purchase. the function d(y) = 0.80y - 5 can be used to find d, the cost, in dollars, of an item that has not been sold for a month, where y is the discount store price, in dollars. create a function d(c(x)) that represents the final price of an item when a costumer buys an item that has been in the discount store for a month. d(c(x)) =

Which expression is rational? 6. , square root two, square root 14, square root 49