Answer:
32
Step-by-step explanation:
XY means x times y
and x = 8 or x is 8
and y = 4 or y is 4
so 4 times 8 is 32
so
XY = 32
24 to the power of 4
24x10x10x10x10 = 240,000
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10^[ 12 - ( - 3 ) ] = 10^( 12 + 3 ) = 10^15 ;
We use the formula
:
Answer:
6 seconds
Step-by-step explanation:
Initial distance of Mario from motion detector = 2 ft
Speed of Mario = 1.5 ft/sec
Total distance of Mario from motion detector = 11 ft
Total distance moved by Mario while walking at the rate of 1.5 ft/sec = 11 - 2 = 9 ft
Given that:
Distance = 9 ft
Speed = 1.5 ft/sec
<em>Formula:</em>
![Distance = Speed \times Time](https://tex.z-dn.net/?f=Distance%20%3D%20Speed%20%5Ctimes%20Time)
![\Rightarrow 9 =1.5 \times Time\\\Rightarrow Time = \dfrac{9}{1.5}\\\Rightarrow Time = \bold{6\ sec}](https://tex.z-dn.net/?f=%5CRightarrow%209%20%3D1.5%20%5Ctimes%20Time%5C%5C%5CRightarrow%20Time%20%3D%20%5Cdfrac%7B9%7D%7B1.5%7D%5C%5C%5CRightarrow%20Time%20%3D%20%5Cbold%7B6%5C%20sec%7D)
So, at <em>6 seconds</em>, Mario will be 11 ft from the motion detector.