Ruth goes to school 8 hours a day and 5 days a week. She is in math class 25% of this time. How many hours per week does she spend in math class?
She is in school for 40 hours because 5 x 8 = 
<gadget id="calculator">5*8</gadget>
<output>40</output>
40.
She is in math class for 10 hours a week because 40 x .25 = 
<gadget id="calculator">40*.25</gadget>
<output>10</output>
10.

<result>10</result>