8. What is the first term of the geometric sequence whose 4th term is -3 and sixth term is ?
A. -27
B. -81
C.
D.
C. -1
-1
81
27
9. Find the sum of the first seven terms of a geometric sequence 3, 6, 12
A. 189
B. 281
C. 381
D. 389
3
3
1
-
+
-
1
10. Find the sum of the infinite geometric sequence
A.
B.
1
C.
1
16
32
3
+
64
1
8
2
3
4
11. If the sum of the first seven terms of a geometric sequence is 547 and the
common ratio is -3. Find the first of this sequence.
A. 1
B. 2
C. 3
D. 4
12. The first ticket drawn in a cake raffle will pay the buyer P10. Each succeeding
ticket will pay 3 times as much as the preceding one. What is the total amount
paid of the first ten cake raffle ticket?
A. 595,230
B. 590,490 C. 595,250 D. 595,258
2

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.