Explanation:
Mass of boy = 40 kg
Mass of box = 20 kg
Total mass = 60 kg
Initial potential energy = 0 (since height would be 0 initially)
Final potential energy = mgh
Taking g as 10 m/s²,
=> 60 × 10 × 15
= 9,000 J
So, work done = final potential energy - initial potential energy
= 9,000 J
Power = Work/Time
=> Power = 9000/25
=> Power = 360 J/s
or 360 watt.
Answer:
$144
Step-by-step explanation:
Volume of the pyramid = 1/3BH
Base area B = 1/2 * 6 * 4
Base area B = 12 ft²
Height H = 4ft
Volume of the pyramid = 12 * 4
Volume of the pyramid = 48ft³
SInce 1 ft³ = $3
48ft³ = x
Cross multiply
x = 3 * 48
x = 144
Hence the cost of the sign is $144
Answers:
___________________________In fraction:

.
___________________________In decimal:
0.38 .
_________________In percent:
38 % .
_________________Explanation:_________________19/50 = (19*2)/(50*2) = 38/100 .
38/100 = 38 ÷ 100 = 0.38 .
38/100 = 38 % .
___________________________
N/3>1
n>1*3
n>3 or (3,+∞)
Solution: n>3 or (3, +∞)