5. A school has a goal of raising \( \$ 6,000 \) to buy new sports equipment. Students raise \( \$ 3,535 \) by having a bake sale and \( \$ 2,382 \) by having a car wash. a. Estimate the total amount of money the students have raised by rounding each value to the nearest thousand.

Evaluate the expr \( 8 y+4 \) for \( y=7 \)

In the cost function below, \( C(x) \) is the cost of producing \( x \) items. Find the average cost per item when the required number of items is produced. \( C(x)=4.5 x+9,300 \) \( \begin{array}{lll}\text { a. } 200 \text { items } & \text { b. } 2000 \text { items } & \text { c. } 5000 \text { items }\end{array} \)

\( \operatorname { IUn } [ 22 ^ { 4 } ] = \frac { 4 ^ { 2 } + 1 - ( z ^ { 2 } + 1 ) } { z } \)

Na equação: \( 3 x^{2}+2 x+c^{2}=0 \), sendo o coeficiente \( c \) um número negativo, o valor de \( \underline{c} \) para que o produto entre as raízes dessa equação seja 48 é: \( \begin{array}{lllll}\text { a) }-11 & \text { b) }-8 & \text { c) }-9 & \text { d) }-14 & \text { e) }-12\end{array} \)

\( 21 mm = \square cm \)