Which of the following pairs is not correctly written in scientific notation? 1,207,000 = 1.207 × 10(to the 6th power) 6,500 = 6.5 × 10(to the 2nd power) 901 = 9.01 × 10(to the 2nd power) 40,200 = 4.02 × 10(to the 4th power)

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?

What is the approximate difference in tenths between √12 and √15?

The salesperson earns a 5% commission on the first $5,000 she has in sales. the salesperson earns a 7.5% commission on the amount of her sales that are greater than $5,000. this month the sales person had $8,000 in sales. what amount of commission, in dollars, did she earn?