Ineed ! can somebody me plz! i'll mark brainliest!
it costs $225.60 to build an iphone. apple markups the cost of the iphone by 185%. what is the cost of the iphone?

Shryia read a 481 -page-long book cover to cover in a single session, at a constant rate. after reading for 1.5 hours, she had 403 pages left to read. how fast was shryia reading? pages per hour how long did it take her to read the entire book? hours plz i realy need this

A(t)=728(1+0.04)^t how much money did aditya originally invest

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?