8. Jan needs to buy a backpack and several folders for school. If she shops at Smart
Supply, the backpack will cost $45 and folders
cost $0.45 each. If she shops at The Supply
Guys, the backpack will cost $50.40 and
folders cost $0.15 each. Write and solve an
inequality to find the number of folders Jan
would need to buy for The Supply Guys to be
the cheaper option.

Someone me what is the area of this figure? 18m 18m 8m 16m

Se tiene en una caja de canicas 10, 4 blancas y 6 negras ¿cual es la probabilidad que en 2 extracciones con reemplazo sean blancas? ¿cual es la probalidad que en 2 extracciones sin reemplazo sean negras?

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.