Anja is choosing her extracurricular activities for the year. How many combinations are possible?
She can choose one sport to play and one instrument to
learn using the lists below.
combinations
Sports: softball, basketball, tennis, or swimming
Instruments: guitar, piano, or clarinet

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

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.

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.