The number of calories c that are burned by walking depends on t, the number of hours spent walking. if you burn 300 cal/h, how many calories do you burn in 2.5 hours of walking?

650 calories

750 calories

260 calories

120 calories

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

Graph the line with the given slope m and y-intercept b. m=-3,b=1

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