Answer:
The volume of the tent is 
Step-by-step explanation:
we know that
The volume of the square pyramid (child's tent) is equal to

we have


substitute

Answer:
10 red marbles
Step-by-step explanation:
Total= 45 marbles
Probability of red= 2/9
Number of red= 45*2/9= 10
My best choice is A. -76. I might be wrong! Best of luck. :-)