Find the sum of the first 25 positive multiples of 4 find

Question

Assignment

1. Find the sum of the first 25 positive multiples of 4.

A. 2,600
B. 1,250
C. 1,000
D. 1,300

2. Find S₇ for 3 + 8 + 13 + 18 +...

A. 116
B. 121
C. 126
D. 131

3. Find S₁₁ for 3 + 1 + (-1) + (-3) +...

A. -77
B. -75
C. -73
D. -71

4. Find S₂₅ for 3 + 7 + 11 + 15 + ...

A. 1263
B. 1267
C. 1271
D. 1275

5. Find the sum of the terms of the geometric sequence 3, 6, 12, 24.

A. 40
B. 42
C. 45
D. 50

6. Find S₁₀  for a geometric series with first term 10 and common ratio 4.

A. 10,485,750
B. 1,048,586
C. 2,621,440
D. 3,495,250

7. Find S₁₁ for the geometric series 1 + 3 + 9 + 27 +...

A. 84,934
B. 88,573
C. 93,198
D. 96,143

8. Find S₂₀ for the geometric series 4 + 12 + 36 + 108 + ...

A. 5,034,043,187
B. 5,123,498,245
C. 6,973,568,800
D. 7,321,089,348

9. A maple tree loses 384 leaves during the first week of fall, and 1.5 times as many on each successive week. At the end of 7 weeks, all the leaves have fallen. How many leaves fell from the tree?

A. 13,120
B. 6,177
C. 12,354
D. 6,561

10. Bill has decided to eat a healthier diet by decreasing the amount of salt he eats. He has decided to allow himself 35,000 milligrams of sodium in the first week of a new diet. Each week he will decrease the amount of sodium by 10%. How much sodium will he consume in the first 9 weeks of his new diet?

A. 112,862 mg
B. 163,015 mg
C. 214,403 mg
D. 315,000 mg.