A triangular number can be the number of dots that form a triangle, where each row has one more dot than the row above. The first four triangular numbers are 1, 3, 6, and 10. The formula t=12n2+12n gives the nth triangular number. You can solve the formula for n by subtracting t from each side so that the equation is in standard form and then using the quadratic formula. What values would you use for a, b, and c? Enter your answers in the boxes. a = , b = , c =

You have $600,000 saved for retirement. your account earns 5.5% interest. how much, to the nearest dollar, will you be able to pull out each month, if you want to be able to take withdrawals for 20 years?

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.

Anyone know these questions? i need ,.