Answer:
d.
Step-by-step explanation:
1. The first step is calculate the inverse cosine function shown in the exercise and substract this resul with π/2, as following:
2. Then you have that:
3. Simpliying:
Answer: -7
Step-by-step explanation: minus and a plus makes a minus, then, add you ad the -5 and -2 which equals -7
The root of this parabola are x'=2 & x'' = 4, these are the value of x intercepts. The midpoint = (4-2)/2 = 1
The statistical test that can be used for the given statements is; the goodness-of-fit test
<h3>How to determine the best statistical tests?</h3>
1) For the archeologist story, the goodness-of-fit test is the best and most relevant test that can be applied because the archaeologist wishes to determine if her prediction was correct by comparing the actual number of artefacts recovered in each grid section to the expected frequencies.
2) The economist generates a list of expected stock market index points for the next two weeks, as well as the actual points at the end of each trading day. The economist then compares the actual and expected points to ensure that the model he constructed is accurate. As a result, economists can use the goodness-of-fit test in this study.
Read more about Statistical Tests at; brainly.com/question/15980493
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Oh. I thought you meant 3-6, not questions 3 through 6. Sorry :(