8. Erika has 6 boxes of buttons. Each box holds 28 buttons.
Explain how Erika can use place value and regrouping to
find how many buttons there are.

Elena is paid a constant rate for each hour she works. the table shows the amounts of money that elena earned for various amounts of time that she worked.

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =