If a single cook can bake 3 large cakes per hour and the kitchen is available for 3 hours, a single cook can bake 3 x 3 = 9 large cakes during that time. 26 large cakes are needed for the party so \( \frac{26}{9} \) = 2\(\frac{8}{9}\) cooks are needed to bake the required number of large cakes.

If a single cook can bake 16 small cakes per hour and the kitchen is available for 3 hours, a single cook can bake 16 x 3 = 48 small cakes during that time. 280 small cakes are needed for the party so \( \frac{280}{48} \) = 5\(\frac{5}{6}\) cooks are needed to bake the required number of small cakes.

Because you can't employ a fractional cook, round the number of cooks needed for each type of cake up to the next whole number resulting in 3 + 6 = 9 cooks.

Jennifer scored 87% on the test meaning she earned 87% of the possible points on the test. There were 90 possible points on the test so she earned 90 x 0.87 = 78 points. Each question is worth 3 points so she got \( \frac{78}{3} \) = 26 questions right.

To divide terms with exponents, the base of both exponents must be the same. In this case they are so divide the coefficients and subtract the exponents:

\( \frac{-5z^9}{8z^4} \)
\( \frac{-5}{8} \) z^{(9 - 4)}
-\(\frac{5}{8}\)z⁵

A number with an exponent (b^e) consists of a base (b) raised to a power (e). The exponent indicates the number of times that the base is multiplied by itself. A base with an exponent of 1 equals the base (b¹ = b) and a base with an exponent of 0 equals 1 ( (b⁰ = 1).

To find the average of these 4 numbers add them together then divide by 4:

\( \frac{16 + 12 + 17 + 11}{4} \) = \( \frac{56}{4} \) = 14