James bought 5 baseball cards at a garage sale for $0.65 each. he sold them to a collector for $2.25 each. what was his profit?
(1 point)$3.25
$8.00
$11.25
$14.50

10.

what is 0.000750 in scientific notation?
(1 point)75 × 10–4
7.5 × 10–3
7.5 × 10–4
7.5 × 10–5

11.

what is thirty-one over five written as a decimal?
(1 point)1.6
6.1
6.2
6.5

12.

the table below shows the populations of four countries for the year 2006 expressed in scientific notation.

population in 2006

country

population

lebanon 3.90 × 106
mexico 1.08 × 108
peru 2.84 × 107
spain 45.5 × 106

of the countries listed, which one had the largest population in 2006?
(1 point)lebanon
mexico
peru
spain

13.

what is 2.28 × 10–8 in standard form?
(1 point)228,000,000
22,800,000
0.228
0.228