What effect does exercise have on the rate of heart beat

Exercise increase the rate at which energy is needed from food, increasing the need for both food and oxygen by the body .this is why when we doing exercise both pulse/heart rate and breathing rate increase. when we doing exercise the pulse rate is an indication of your heart rate as you arteries expand each time the ventricles pump blood out of the heart.

9.9 years

a = p(1 + rt) . . account balance after time t at rate r starting with principal p

3000 = 2500(1 + 0.0202t) . . filling in the given numbers

1.2 = 1 + 0.0202t . . divide by 2500

0.2 = 0.0202t . . . subtract 1

0.2/0.0202 = t ≈ 9.901

it will take about 9.9 years for the account balance to reach $3000.

the transfer for conduction is the heat transfering from the liquid to the spoon

the transfer for convection is the heat rising from the liquid to the air

the transfer for radiation is the heat going through the sides of the cup and to the air

at least that is what i would do