Jamal's burger stand sold 41 hamburgers for $1.25 each and 51 cheeseburgers for $1.75 each. After selling all the burgers, Jamal took $20
out of the cash register and gave it to the cook. How much money did he
have left over?
A $140.50
B $135.50
C $120.50
D
$115.50

huh? im pretty sure it is in 199

step-by-step explanation:

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

answer: 0.1,0.85

step-by-step explanation: