Tobias exchanged his canadian dollars for u. s. dollars and then gives $15.75 to margaret

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?