What do the signs need to be to multiply to get a positive and add to get a negative ?

Write each expression in exponential form and find its value. 2 x 2 x 2 x 2

Subscriptions to a popular fashion magazine have gone down by a consistent percentage each year and can be modeled by the function y = 42,000(0.96)t. what does the value 42,000 represent in the function?

Explain how you can find the missing fraction in 3 4/5 / (blank) 2 5/7. then find the missing fraction.