It rained all day, so many people played games. In the ring toss, 4 people won the grand prize, 15 people won the first prize, and 30 people won a consolation prize. How many more people won the first prize than the grand prize?
A. 30 people won a consolation prize.
B. 15 people won first prize.
C. It rained all day, so many people played games.
D. 4 people won the grand prize.

9 more people

Step-by-step explanation:

There are 15 first prize winners and 4 grand prize winners

that means there are 15 - 4 more first prize winners than grand prize winners

15 - 4 = 9

9 more people won first prize than the grand prize

"standard form:

3x2 + 14x − 10 = 0

solutions based on quadratic formula:

x1   = −14 − √ 142 − 4×3×(−10) /   2×3   = −14 − 2 × √ 79 /   6   ≈ −5.296

x2   = −14 + √ 142 − 4×3×(−10) /   2×3   = −14 + 2 × √ 79 /   6   ≈ 0.629