The charge Q is 512 c.
Step-by-step explanation:
Step 1:
The equation is
, where q and Q are the charges, R is the distance between the charges, and F is the force between the charges.
From the question, we have;
F = 40 Newton, R = 16 m and q = 20 C.
We need to calculate Q.
Step 2:
By substituting the values of F, R, and q in the equation, we get
.
We cross multiply to solve Q.

So Q = 512 C.
She got 87.5 percent. you find the answer by setting up a proportion
ANSWER

EXPLANATION
Let

be the equation.
We can choose any two ordered pairs to determine the equation of the relation.

We find m using the formula;


The equation becomes

When x=6, y=15.
This implies that,




The equation of the relation is therefore,

Answer:
58%
Step-by-step explanation:
This is because you need to set up the equation _ % of _ is _ and then plug in numbers. _% of 377 is 217 is the final equation. Then divide 217 by 377 which is 0.57559681697. Then you round to the nearest hundredth to get 58%