Practice : Simplify each expression. Show your work. Your answer should be written in scientific notation,
1) 8.1 • 103 + 2.6. 102
2) 7.05. 109-5. 106
4) (4.2.108) + (2.102)
3) (1.4. 109) (2.2.102)

Do graduates from uf tend to have a higher income than students at fsu, five years after graduation? a random sample of 100 graduates was taken from both schools. let muf be the population mean salary at uf and let mufsu be the population mean salary at fsu. how should we write the alternative hypothesis?

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

A50% increase followed by 33 1/2% decrease