F is inversely proportional to d 2 . When F = 3 , d = 4 Work out F when d = 2

F = 6

Step-by-step explanation:

When something is inversely proportional to another thing, when one of the numbers increases or gets multiplied by a constant, the other number decreases or gets divided by a constant.

In this scenario, when F = 3, d = 4.

When d = 2, we are dividing the earlier value of 4 by 2. Now, since F is inversely proportional to d, we have to multiply the value of F by 2 to get what F equals when d = 2. 3 times 2 is 6, so F = 6 when d = 2.

3 1/3 x 2 3/5 = 8 2/3

step-by-step explanation:

just multiply the first number by the second number to get your answer.

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