Answer:
D) 50
Step-by-step explanation:
Since each day 4 more people sign up, on day 7, 46 + 4 or 50 people will have signed up.
6
8.05 divided by 1.25 is 6.44
√50x³y
= √5²×2×x²×x×y
= 5x√2xy
d is the correct answer