1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mojhsa [17]
3 years ago
7

the sum of the first 6 terms of a geometric series is 15624 and the common ratio is 5. what is the first term of the series?

Mathematics
1 answer:
9966 [12]3 years ago
7 0

Answer:

first term a=4

Step-by-step explanation:

Sum of the first 6 terms S6 = 15624

common ratio r= 5

n= 6

first term a=?

Formula: S6= a(r^n-1)/r-1

15624 = a( 5^6-1)/5-1

15624 = a(15625-1)/4

15624= a( 15624)÷4

15624= 15624a÷4

Cross multiply

15624×4 = 15624a

62496 = 15624a

divide both sides by 15624

62496÷15624 = 15624a÷15624

4 = a

a= 4

You might be interested in
How do I get rid of log and ln?
insens350 [35]
Exponentiate the log or In because Exponentials are inverses of Logs and lns.
7 0
3 years ago
The Queen Mary is a large cruise ship that has 8,123,700 cubic feet of cargo space. Express this number in scientific notation.
mixer [17]
<span>8,123,700 = 8.1237 x 10^6
so answer is </span>D. 8.1237 x 10ˆ6
hope it helps
8 0
3 years ago
Read 2 more answers
PLSSS HELLPPPPP ASAPPP
padilas [110]
I believe it would be 80
8 0
3 years ago
Read 2 more answers
A bus trip takes 1.5 hours. By plane, the same trip takes 30 minutes. How
DENIUS [597]

Answer:

2 times faster

Step-by-step explanation:

because the plane takes one hour less than the bus and 60 min equal a hour and 30 plus 30 equal 60 which is a hour so then it would be 2 times as faster because it is 30 twice to equal the 60

4 0
3 years ago
A multiplication table. In the row labeled 3, the numbers 3, 6, 9, 12, 15, 18, 21, 23, and 27 are highlighted. In the row labele
kondaur [170]

Answer:

24:27

Step-by-step explanation:

i got it right on my unit test :)

3 0
3 years ago
Other questions:
  • HELP PLEASE!
    5·1 answer
  • I need help on these two question
    5·1 answer
  • 14=−2c−6−3c what is the value of c?
    8·1 answer
  • Anita took 1/6 of a cake and Barry took 60% of what remained. What fraction of original cake is left. Explain full method.
    11·2 answers
  • How many liters of pure acid must be added to 3 liters of 50% acid solution to obtain a 75% acid solution?
    9·1 answer
  • Given f(x) = 4 - 3x, what is the value of f(-5)?
    9·1 answer
  • Help pleaseeeeeeeeee
    15·1 answer
  • From a point on the ground, Geoff measures the angle of elevation of a 130m tower to be 36°. How far from the base of the tower
    7·1 answer
  • Find the volume of a pyramid with a square base, where the side length of the base is
    6·1 answer
  • 59. In the given figure, O is the centre of circle, XY || BC, what is the value of x?​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!