A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
HELP FOR A MEDAL!! ms.Campbell invested $7200 for 2 1/2 years. If she earned $756, at what rate(R) did she invest her money?
anonymous
 one year ago
HELP FOR A MEDAL!! ms.Campbell invested $7200 for 2 1/2 years. If she earned $756, at what rate(R) did she invest her money?

This Question is Closed

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.0money earned = (investment)*(1+rate/100)^time

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.0plug in your numbers and solve for r

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I did ....7200=(756) (?) (2 1/2) I=PRT

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I multiplied (756) * (2 1/2) and got 1890 and then divide 7200/ 1890 and got 3.8095238 it's wrong :(

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.0756 = (7200)(1+rate/100)^(2.5)

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.0(756/7200) = (1+rate/100)^2.5

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.0(756/7200)^(1/2.5) = 1 + rate/100

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.0(756/7200)^(1/2.5)  1 = rate/100

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.0oh, whoops, small mistake on my part money earned = 7200+756 ([7200+756]/7200)^(1/2.5)  1 = rate/100 solve for rate

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Hmmm would it be cross multiply 1.105 1/2.5 ?? :)
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.