Given that sin(theta)=2/5 and 0 degrees<(theta)<90degrees, what is the exact value of csc (theta)?

There will be 7 people at a party.if each person will eat 5/8 of a pound of chicken, how many pounds of chicken are needed?

Suppose that a households monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hundreds of cubic feet, hcf). when graphed, the function gives a line with slope of 1.65. if the monthly cost for 13 hcf is $46.10 what is the monthly cost for 19 hcf?

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.