The Bill and Melinda Gates Foundation hires you as a consultant to determine how best to use $20 billion to save the world. What's your plan? Question #2: What suggestions will you give Bill and Melinda Gates? What evidence will you use to support your suggestions?

The $20 billion can be used for tree plantation and crops growth.

Step-by-step explanation:

Bill and Melinda Gates Foundation should use the $20 billion to grow trees. They should start tree plantation drive. This will improve the climate temperature and also the agricultural growth of the country will increase. The growth in crops will be sufficient for exports also. The GDP growth of the company will increase and the development of the country will also improve. The lifestyle of people living in the city will change to better and improvement will be witnessed in their health as they will consume fresh vegetables and fruits.

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