Select the correct answer Gavin collects a certain type of seashell. He has 160 seashells. The seashells' weights are distributed normally, with a mean of 120 grams and a
standard deviation of 26 grams.

How many of the seashells weigh at least 68 grams?
A 134
В.152
C.156
D. 109

Which expression is equivalent to 2x^2+7x+4?

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?