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
0.0000000228
0.000000228
