For what percentage of time has life existed on earth (round to the nearest whole number).

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

Samantha is growing a garden in her back yard. she spend $90 setting up the garden bed and buying the proper garden supplies. in addition, each seed she plants cost $0.25. a. write the function f(x) that represents samantha's total cost on her garden. b. explain what x represents. c. explain what f(x) represents. d. if samantha plants 55 seeds, how much did she spend in total?

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.