Wang Yong owes the bank \$8500$8500dollar sign, 8500. To repay the debt, he paid a fixed amount back to the bank each month. Aft

The variation in pricing is not due to the type of activity since it remains the same. Instead, the cost fluctuates based on the day of the week.

(a) When rounded, 14.90 becomes 15, and 1.25 rounds to 1, so 15-1 results in $14.
(b) My estimate may be higher as I had to round the larger number up while the smaller number was rounded down, creating a greater difference between the estimate and the actual amount.
(c) The computation yields 14.90-1.25=13.65, thus Pedro has $13.65 remaining in his wallet. The difference between the estimate and the actual figure is 14-13.65=0.35, indicating a $0.35 discrepancy between the estimate and the actual remaining amount in Pedro's wallet.

The fraction of students who dedicate at least 2 hours to social media is 0.7257.

Answer: A

Detailed explanation:

The confidence interval for the difference in proportions is represented as

Difference in sample proportions ± margin of error

Sample proportion, p is calculated as x/n

where x denotes the number of successes

and n indicates the total number of samples

For the initial treatment,

x = 35

n1 = 50

p1 = 35/50 = 0.7

For the second treatment,

x = 16

n2 = 40

p2 = 16/40 = 0.4

Margin of error is calculated as z√[p1(1 - p1)/n1 + p2(1 - p2)/n2]

To find the z score, we subtract the confidence level from 100% to obtain α

α = 1 - 0.99 = 0.01

α/2 = 0.01/2 = 0.005

This represents the area in each tail. As we are focused on the area in the center, it becomes

1 - 0.005 = 0.995

The z score for this area on the z table is 2.576. Consequently, for a 99% confidence level, the z score is 2.576

Margin of error = 2.576 × √[0.7(1 - 0.7)/50 + 0.4(1 - 0.4)/40]

= 2.576 × 0.10099504938

= 0.26

The confidence interval is calculated as 0.7 - 0.4 ± 0.26

= 0.3 ± 0.26

Thus, Option A is the correct answer

4/5 expressed as a decimal is.8

so 4/5 equals eight-tenths:)