The answer is in the image
F=ma
where F=force
m=mass
a=acceleration
Here,
F=4300
a=3.3m/s2
m=F/a
=4300/3.3
=1303.03kg
Approximately it is aqual to 1300kg
Volume of rectangular prism=length * width * height
Given,
length=3/8cm
breadth=5/8cm
height=7/8cm
therefore volume=(3/8)*(5/8)*(7/8)
=105/512 cm3
We can put the numbers in ascending order-
36, 38, 39, 39, 40, 47, 48, 51
Range=max-min
=51-36
=15
III is the case of joint variation as Area A depends on l and w
In I and II it depends on s and r respectively as pi is constant
Volume of pool = 1472 m^3
Length = 36.8m
Breadth = 20m
We know,
Volume = l*b*h
1472 = 36.8 * 20 * h
h = 1472/736
h = 2m
Pool is 2m deep
Speed = distance/time
distance = 60 feet
time = 30 sec
speed = 60/30
= 2 feet/sec
Given eq k = 10t-19
Given t = -7
k = 10*(-7) - 19
= -70 -19
=-89
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