Answer:
A
Step-by-step explanation:
a. 28 * 63
28 (60) + 28 (3) or 20 (60) +20 (3) + 8 (60) + 8 (3)
1680 + 84=1764 1200 / 60 +480 +24=1764
b. 17(59)
17 (50) + 17 (9) or 10 (50) + 10 (9) + 7 (50) +7 (3)
850 + 153=1003 500 + 90 + 63 =1003
c.458 (15)
458 (10) +458 (5) or 10 (400) + 10 (50) + 10 (8) + 5 (400) +5 (50) + 5 (8)
4580 +2290 = 6870 400 + 500 + 80 + 2000 + 250 + 40 = 6870
My work is kinda confusing but hope it helped
This problem is in Khan Academy
In this graph the instantaneous velocity=decline.
You just have to do this:
And the answer is letter (A)
The first one is, because when you have an exponent multiplied by an exponent, you keep the base and just multiply the exponents when you do this, you get 7^-6. When you have a negative exponent you simply put the exponential answer as if it were positive on the denominator of a fraction with the numerator of 1.