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For a science project, James needs to fill a tennis ball
with sand he doesn't know how much he will need. He
measured the diameter of the tennis batt and found it to
be 6 cm. What is the approximate amount of sand he
needs to fill the tennis ball?

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.