*i can't figure out were to start*

carissa also has a sink that is shaped like a half-sphere. the sink has a volume of 2000/3 pi in³. one day, her sink clogged. she has to use one of two conical cups to scoop the water out of the sink. the sink is completely full when carissa begins scooping.

(a) one cup has a diameter of 4 in. and a height of 8 in. how many cups of water must carissa scoop out of the sink with this cup to empty it? round the number of scoops to the nearest whole number.

(b) one cup has a diameter of 8 in. and a height of 8 in. how many cups of water must she scoop out of the sink with this cup to empty it? round the number of scoops to the nearest whole number.

Y=4x^2+x-1 solve using quadratic formula

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

Someone answer this asap rn 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)) =