Chemicals for the pool are sold in 2 kg packs for £25.80. It can also be bought in 20 kg bags for £199. What is the saving per kg when
buying in bulk?

Factor the following expression completely 6x^11-24x^7

Graph each quadratic function and identify its key characteristics. f(x) = x^2 - 2x - 3

Anull hypothesis states that the difference between 8 hours of sleep and 3 hours of sleep has no effect on the number of pictures a student will remember during a picture memory interface test (pmit). examining the mit database, an extremely small t-value of 0.1611 is found. this t-value is much smaller than the smallest t-value on the chart for p-value reference. from this information we can: select one: a. accept the null hypothesis because the p-value obtained shows that the difference between the two groups being tested is not statistically significant b. accept the null hypothesis because the p-value obtained was statistically significant c. reject the null hypothesis because of the p-value obtained d. reject the null hypothesis because the data obtained is statistically significant