Which statement explains how you could use coordinate geometry to prove the diagonals of a quadrilateral are perpendicular? Use the slope formula to prove the slopes of the diagonals are the same. Use the slope formula to prove the slopes of the diagonals are opposite reciprocals. Use the distance formula to prove the lengths of the diagonals are the same. Use the distance formula to prove the midpoints of the diagonals are the same.

Asphere has a diameter of 10 in. what is the volume of the sphere?

Simplify the given expression leaving the answer in improper fraction form. 2/3+5/6

According to a research study, parents with young children slept 6.4 hours each night last year, on average. a random sample of 18 parents with young children was surveyed and the mean amount of time per night each parent slept was 6.8. this data has a sample standard deviation of 0.9. (assume that the scores are normally distributed.) researchers conduct a one-mean hypothesis at the 5% significance level, to test if the mean amount of time parents with young children sleep per night is greater than the mean amount of time last year. the null and alternative hypotheses are h0: μ=6.4 and ha: μ> 6.4, which is a right-tailed test. the test statistic is determined to be t0=1.89 using the partial t-table below, determine the critical value(s). if there is only one critical value, leave the second answer box blank.