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#1 Jeanne's bank account earns interest annually. The equation shows her starting balance of ​$200 and her balance at the end of five ​years, ​$267.65. At what rate r did Jeanne earn​ interest?
r= ​%
​(Type an integer or decimal rounded to the nearest tenth as​ needed.)



#2 The volume of a soap bubble is 62.3mm^3 Find the radius and diameter of the soap bubble. Use 3.14 for pie.
The radius of the bubble is about mm.
​(Round to the nearest tenth as​ needed.)

Respuesta :

Answer:

1. 6%

2. what is the radius of 2

Step-by-step explanation:

Answer:

#1 = Rate = 0.025

#2 = m^2

Step-by-step explanation:

#1

1. starting balance = 200

balance at the end of 4 years = 220.82

2. 200.82 = 200(1+r)^4

220.82

________  = (1 + r)^4

  200

1 + r = (1.1041)^1/4

1 + r = 1.025 - 1

r = 0.025

Rate = 0.025

#2

62.3m⋅m^3=62.3m^4

3.14=62.3m^4

m⋅m=m^2

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