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
HACTEHA [7]
3 years ago
15

grandma gigi gave leyla a rare purple stone for her sweet 16 birthday. at that time,the stone was worth$245. it has been increas

ing in value by the same percentage each year, when Leyla turned 21, the stone was worth $560.50. if s(t) represents the value in dollars of the stone t years after grandma Gigi gave it Leyla determine the value of a and r if s(t)=a(r)
Mathematics
1 answer:
sergij07 [2.7K]3 years ago
4 0
This is a compound interest problem, therefore s(t) should be in the form:
s(t) = a(r)^{t}

where: 
t = time in years
s(t) = the value of your item after t years
a = the initial value of your item
r = rate

Therefore, we already know that a = 245$.

Now, we can calculate r:
r^{t}=\frac{s}{a}
r =  \sqrt[t]{ \frac{s}{a} }
r = \sqrt[5]{ \frac{560.50}{245} }
     = 1.18

Therefore, the correct answers are a = 245 and r = 1.18

You might be interested in
You have a set of cards labeled 1-10. Set A is drawing an even card. Set B is drawing a 8 or higher.  What is the  P ( A ∪ B ) ?
creativ13 [48]

set A = {2, 4, 6, 8, 10}   (only even cards)

set B = {8, 9, 10}    (8 or higher)

( A ∩ B ) means the numbers which are common in both sets .

They both have 8 & 10 in common. 

So the answer is: P(A ∩ B) = {8,10}

5 0
3 years ago
a store buys CDs with $1 for each and sells them for 1.5 each how many CDs should they sell to earn $100
abruzzese [7]
67 CDS

100/1.5=^
Hope this helps!
6 0
3 years ago
Read 2 more answers
What is m∠KNL?<br> Cough coufh coufh I need to add words
horsena [70]
The measure of angle KNL is 102.
5 0
3 years ago
If I have a garden that's ten yards and I want to plant a plant that requires 2 yards how many plants can I plant
Damm [24]

Pretty sure it's 5. 5X2=10. Sooo

6 0
3 years ago
48.76 divided by 3 please help !!!!!! (^_^)
BartSMP [9]
14.76 divides by 3 equals 16.2533
7 0
3 years ago
Read 2 more answers
Other questions:
  • A sundae requires 3 ice-cream scoops and 4 strawberries, and a milkshake requires 2 ice-cream scoops and 6 strawberries. Ramses
    9·1 answer
  • He​ _____________ distribution is used to develop confidence interval estimates of variances or standard deviations.
    6·1 answer
  • PLEASE HELP IM STUPID IDK HOW IM IN 7th GRADE BUT WHATEVA IM NOT DUMB HALF OF THE TIME
    11·1 answer
  • The weight V of an object on Venus varies directly with its weight E on Earth. A person weighing 120 lb on Earth would weigh 106
    14·2 answers
  • What formula is used to find the circumference of a circle?<br><br> isn't it C = 2πr ?
    8·2 answers
  • Calculate the probability of each of the following events. (a) {at most three lines are in use} .72 Correct: Your answer is corr
    7·1 answer
  • 6
    12·1 answer
  • Which is a better statistical question A:how many points per game did your team score? B:how many games did your team play this
    9·2 answers
  • The volume of a cube is 125m find it's side​
    6·1 answer
  • There are 27 tickets at the theater to watch our movie. Then there were 13 people in line after the tickets were bought. How man
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!