Jo borrowed 3,800 for 4 months from a bank. the bank discounted the loan at 5.5%.

a.

I=prt

I=(3800)(.055)(4/12)

I=$69.67

b.

Principal-interest=money received from Bank

3800-69.67=$3730.34

c.

I=prt

69.67=3730.34(r)(4/12)

69.67=1243.45r

69.67/1243.45=1243.45/1243.45r

.056≈r

Rate is 5.60%

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

happy to

pls mark as brainliest

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places