Question 4 (Mandatory) (1 point) A quarter is flipped up in the air at the start of a football game and returns to the point from which it was flipped after 2.5 s . Find the quarter's original speed. The acceleration of the quarter is \( 9.8 \mathrm{~m} / \mathrm{s} / \mathrm{s} \) downward. \( 4.9 \mathrm{~m} / \mathrm{s} \) \( 25 \mathrm{~m} / \mathrm{s} \) \( 12.25 \mathrm{~m} / \mathrm{s} \) \( 49 \mathrm{~m} / \mathrm{s} \)

C. 16 solve lingar equations with variables on both sides: word problems H9G Jill wants to have a bowling party with her friends. Normally, the local bowling alley charges \( \$ 4 \) per person to bowl and \( \$ 3 \) per person for shoe rentals. However, the alley also has a group rate of \( \$ 90 \) for everyone to bowl, along with a discounted rate of \( \$ 2 \) per person for shoe rentals. How many people would need to go to the party for the two options to cost the same?

\( t=\begin{array}{c}\text { Total Balanee }=3,000,000 \\ 3,000,000 \times \frac{0.05}{12} \\ {\left[\left(\left(1+\frac{0.05}{12}\right)^{(1260)}-1\right]\right.}\end{array} \)

The Coffee Counter charges \( \$ 9 \) per pound for Kenyan French Roast coffee and \( \$ 8 \) per pound for Sumatran coffee. How much of each type should be used to make a 20 pound blend that sells for \( \$ 8.70 \) per pound? The Coffee Counter should mix \( \square \) pounds of Kenyan Roast coffee and \( \square \) pounds of Sumatran coffee to make 20 pounds of a blend that sells for \( \$ 8.70 \) per pound.

d. \( \sqrt{\frac{125 b^{2}}{216}} \)

Determine if \( \left[\begin{array}{rr}-5 & -4 \\ 0 & 1\end{array}\right] \) and \( \left[\begin{array}{cc}4 / 19 & 3 / 19 \\ -5 / 19 & 1 / 19\end{array}\right] \) are inverses of each other.