Apackage shipping company charges $5.25 to deliver a package. in addition ,they charge $0.45 for each pound over one pound . is the cost to ship proportional to the weight of the package

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

Calculate the average rate of change over the interval [1, 3] for the following function. f(x)=4(5)^x a. -260 b. 260 c. 240 d. -240

Jorge wants to determine the enlarged dimensions of a digital photo to be used as wallpaper on his computer screen. the original photo was 800 pixels wide by 600 pixels high. the new photo will be 1,260 pixels wide. what will the new height be?