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
avanturin [10]
3 years ago
7

A leprechaun places a magic penny under a​ girl's pillow. the next night there are 2 magic pennies under her pillow. each night

the number of magic pennies doubles. how much money will the girl have after 19 ​nights?
Mathematics
2 answers:
timurjin [86]3 years ago
7 0

Answer: The girl will have $5242.88 after 19 nights.

Step-by-step explanation:

We know that exponential equation is given by :_

y=Ab^x                (1)

, where A= initial amount

b= Multiplicative rate of growth

x= Time period.

Given : A leprechaun places a magic penny under a​ girl's pillow. the next night there are 2 magic pennies under her pillow.

i.e. A= 1

Each night the number of magic pennies doubles.

i.e. b= 2

Put value of A and b in (1), we get

y=(1)(2)^x  

y=(2)^x  

Put x= 19 , we get

y=(2)^{19}=524288  

Hence, the number of pennies the girl will get after 19 nights = 524288

Since 1 dollar = 100 pennies

⇒ 1 penny = 0.01 dollar [Using unitary method , we divide both sides by 100]

⇒ Total money in dollars = 524288\times0.01=\$5242.88

Hence, the girl will have $5242.88 after 19 nights.

ExtremeBDS [4]3 years ago
3 0
2^18 power = 262,144
You might be interested in
14. A quadratic equation is graphed above.
IrinaVladis [17]

Answer:

D.

Step-by-step explanation:

2=-2,3=-3

2²=-2²,3²=3²

3 0
3 years ago
PLEASE SOLVE THE QESTIONS
jeka57 [31]

Answer:??????????????????

Step-by-step explanation:

3 0
2 years ago
What customary unit would you use to estimate? A car is about 15 _____ long. inches meters yards feet
ch4aika [34]

Answer:

feet

Step-by-step explanation:

3 0
3 years ago
Match each table with the equation that represents the same proportional relationship. Match each table with the equation that r
Alisiya [41]
29 tables of relationships is the answer to your equation above … THANK ME LATER
7 0
2 years ago
Which type of geometry best describes the following statement?
oksian1 [2.3K]

Answer:

answer C

Hyperbolic geometry

The sum of the angles of a hyperbolic triangle is less than 180°.

6 0
2 years ago
Other questions:
  • 10⁵ what does this mean? im stuck
    14·2 answers
  • On the field trip, Abbey, Bethany, Christine, and Darcy bought a total of 4 hot dogs and 3 sodas, which cost the girls $17.00. E
    9·1 answer
  • Solve for k: -2k = k - 7 - 8 and explain in number form
    14·1 answer
  • What value of c makes the trinomial below a perfect square?<br> x^2+9x+c
    10·2 answers
  • [(25 - 11) + (15-9)] *5
    5·2 answers
  • How do you simplify (9x^8y^3)^1/2
    5·1 answer
  • Solve for x<br> -18 = 9 - 3x
    7·2 answers
  • A. 80<br> B. 50<br> C. 70<br> D. 60
    9·1 answer
  • 4 times itself and plus 1 equals this number. What is the number?
    12·2 answers
  • Marcus sleeps 60 hours a week this is 5 times as many hours as he plays chess. How many hours a week does Marcus play chess?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!