Me! i'm not so good with trigonometry! will mark the ! amanda and jeremiah are standing on the same side of a large lake. they are separated by a horizontal distance of 4000 ft. both amanda and jeremiah can see a helicopter that is directly above the horizontal distance between them. amanda’s angle of elevation to see the helicopter is 60° and jeremiah’s angle of elevation to see it is 30°. what is the distance between amanda and the helicopter?

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.