Your answer is √(x + 4).
A strange way to find the inverse of a function is to write it first as y = x² - 4, and then to switch the y and x around to get x = y² - 4. Then you just solve for y, so:
x = y² - 4
+ 4
x + 4 = y²
√
√(x + 4) = y
I hope this helps!
Answer:
7.) 2400
8.) 4200
9.) 1600
10.) 63000
11.) 10000
Step-by-step explanation:
You only round numbers in the left most place like (4687 to 5000 and 29 to 30)
7.) 315 * 8
round 315 to 300
300 * 8 = 2,400
8.) 562 * 7
round 562 to 600
600 * 7 = 4,200
9.) 82 * 15
round 82 to 80 and 15 to 20
80 * 20 = 1,600
10.) 711 * 88
round 711 to 700 and 88 to 90
700 * 90 = 63,000
11.) 126 * 95
round 126 to 100 and 95 to 100
100 x 100 = 10,000
move the decimal point 4 places to the left to get
1.85326 x 10^4