Answer:
$7/hour
Step-by-step explanation
From the question we are told that a computer programmer worked for 10 hours and earned $70, this can be expressed as;
10 hours = $70
We are to find amount he is earning per hour. This can be written as;
1 hour = $x
Divide both expression
10/1 = 70/x
Cross multiply
10 * x = 70 * 1
10x = 70
x = 70/10
x = 7
Hence the rate per hour is $7/hour