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
kherson [118]
3 years ago
14

A student decided to start saving money. On the first day he saved 1 cent, on the second day an additional 2 cents, on the third

day he saved an additional 4 cents. Each day he doubled the amount he saved the previous day. How much would he have saved total on day 20 (in dollars)?'
Mathematics
1 answer:
Shkiper50 [21]3 years ago
4 0

$ 524.288

Step-by-step explanation:

We will use the sum of a geometric series;

S = (first term)(1-r^n)/(1-r)

= 1(1 - 2^n) / (1 - 2)

= - (1 - 2^n)

= 2^n - 1

2 ^ (20 – 1)

2 ^ 19

= 524,288 cents

100 cents =  1 dollar

524,288 cents = 524,288/ 100 dollars

= $ 524.288

You might be interested in
12 subtracted from a number equals 25 find the number
belka [17]

Answer: 12-n=25

-n=25-12

-n=13

Step-by-step explanation:

6 0
3 years ago
The subject of the formula below is y.
Anna007 [38]

Answer:

x = y + 8

Step-by-step explanation:

Given

y = x - 8 ( add 8 to both sides )

y + 8 = x

4 0
3 years ago
Read 2 more answers
Suppose a plane is flying at an altitude of 32,200 feet two minutes after the start of its descent. Ten minutes after the start
lukranit [14]

Answer:

32400

Step-by-step explanation:

im not sure i just timed it by 2

6 0
3 years ago
Read 2 more answers
What is "i"?<br> 9x-7i &gt; 3 (3x-7u)
Natasha_Volkova [10]
I think I would be 1 but I am not so sure
5 0
2 years ago
Read 2 more answers
Consider a nuclear power plant that produces 1200 MW of power and has a conversion efficiency of 34 percent (that is, for each u
Pachacha [2.7K]

Answer:

Fuel used = 111,303,473,760 MJ/year

Step-by-step explanation:

Power production = Fuel energy * Efficiency

1200 MW = Fuel energy * 0.34

Fuel energy = 1200 MW / 0.34 =3529.41 MW

This means it consumes 3529.41 MJ/s.

Per year, it operates 365 days, 24 hours a day, 3600 seconds an hour.

To calculate the fuel used annualy we have to multiplicate by all these factors

Fuel used = 3529.41 MJ/s * 3600 s/hour * 24 hours/day * 365 days/year

Fuel used = 111,303,473,760 MJ/year

4 0
3 years ago
Other questions:
  • If the typos are randomly distributed over the 10 pages, find the probability of having a single typo on each page
    9·1 answer
  • What are the vertex, axis of symmetry, maximum or minimum value, and range of y = 3x^2 + 6x − 1?
    8·1 answer
  • Which pair of measurements is not equivalent? 24 feet, 8 yards 24 inches, 2 feet 10 feet, 120 inches 3 miles, 15,480 feet
    12·1 answer
  • PLEASE HURRY ITS URGENT!<br>What is distance between A &amp; B?<br>​
    9·1 answer
  • If f(x) = x2 – 2x + 3, then find<br> f(-3).
    8·1 answer
  • Suppose that 30% of all students who have to buy a text for a particular course want a new copy (the successes!), whereas the ot
    13·1 answer
  • Ida needs to hire a singer for her wedding. Singer A is offering his services for an initial $65 in addition to $13.15 per hour.
    5·1 answer
  • What is the x-intercept of the following? 5x - 2y = 10​
    14·1 answer
  • Is (-1,3) a solution for y &lt; 2x + 5?
    15·1 answer
  • Slope review help needed ASAP will give brainliest
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!