Can someone be meh waifu and join?

Meeting ID: 944 5633 1537
Passcode: UF9E1b

Which activity is an economic activity

The difference of sample means of two populations is 55.4, and the standard deviation of the difference of sample means is 28.1. which statement is true if we are testing the null hypothesis at the 95% confidence level? a. the difference of the two means is significant, so the null hypothesis must be rejected. b. the difference of the two means is significant, so the null hypothesis must be accepted. c. the difference of the two means is not significant, so the null hypothesis must be rejected. d. the difference of the two means is not significant, so the null hypothesis must be accepted.

Will give brainleist! right answers plz! ! using the paragraph below, find the missing value to complete the t-shirt.