What is the value of the expression 7–3? a. –21 b. negative exponents c. negative exponents d. 343

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Which of the following is closest to 32.9 x 7.5? a: 232 b: 259 c: 220 d: 265

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c = f