A scholarship fund raised $7,000 in contributions. Part of the contributions were invested in bonds paying 6% interest, and the rest were invested in
bank certificates paying 8.5% interest. If the total annual income is $520,
create a system to model the scenario. Then find the amount invested in the
8.5% account.

What is the number 321,000,000 in scientific notation? also what is the number? ?

The length of a field is 100 yards and its width is 75 yards. if 1 inch represents 25 yards, what would be the dimensions of the field drawn on a sheet of paper?

A3cm×3cm\greend{3\,\text{cm} \times 3\,\text{cm}} 3cm×3cm start color greend, 3, space, c, m, times, 3, space, c, m, end color greend rectangle sits inside a circle with radius of 4cm\blued{4\,\text{cm}} 4cm start color blued, 4, space, c, m, end color blued . what is the area of the shaded region? round your final answer to the nearest hundredth.