Answer:
Option A. -6.5
Step-by-step explanation:
we have

Solve for r
That means ---> isolate the variable r
Combine like terns left side of the equation

Divide by 0.5 both sides


0.52 because 52/100 is better than 52/1000 and 52/10000
The solid that has five faces , four lateral faces, one base, five vertices, and eight edges would be :
Square pyramid
Hope this helps
If I’m assuming that symbol next to the C at the end of the question means C mirrored the the answer would be (3,1) but I’m not quite sure what it means
7 books with a cost of 28$ then a 2$ charge which will put him right at 30