There are 21 juice bottles out of which 7 bottles are full. 7 are half-full and the remaining 7 are empty to divided amongst 3 friends equally. You don't have any measuring device. After dividing them ( both bottles and juice ) equally how mach empty bottles each will get?

each friend would have 3 and 1/2 bottles of juice meaning each friend would have 3 fully empty bottles.

the answer is a.

step-by-step explanation:

in three games of golf, alex shot two under par four times.

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