Question

the protect - a - phone factory makes cell phone cases, packs them into boxes, and ships them by truck. a truck that leaves the factory with b boxes carries 40b cell phone cases. this morning, a truck left the factory with 90 boxes. how many cell phone cases was the truck carrying? write your answer as a whole number or decimal. cell phone cases

Explanation:

Step1: Substitute the value of \( b \)

Given the formula \( 40b \) (where \( b \) is the number of boxes) and \( b = 90 \).
Substitute \( b = 90 \) into \( 40b \), so we get \( 40\times90 \).

Step2: Calculate the product

\( 40\times90=(4\times10)\times(9\times10)=(4\times9)\times(10\times10)=36\times100 = 3600\)

Answer:

\( 3600 \)