How does this topic reinforce or change your belief about the application of math to your daily life?

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Find the sixth term of the following geometric sequence.

If two samples a and b had the same mean and standard deviation, but sample a had a larger sample size, which sample would have the wider 95% confidence interval? a. sample a as it comes first b. sample b as its sample is more dispersed c. sample a as it has the larger sample d. sample b as it has the smaller sample