It will take 60 seconds to move one end to the other.
The distance that an object travels in relation to the amount of time it takes to do so can be used to define speed. In other terms, it is a measurement of an object's motion's speed without direction Velocities are what we get when speed and direction are combined.
Given the speed of a person = 21 feet in 7 seconds
speed in per second = 21/7 = 3 feet per second
distance of sidewalk = 180 feet
speed = distance/time
time = distance/speed
time = 180/3
time = 60 seconds
Hence it will take 60 seconds to cover the distance.
Learn more about speed;
#SPJ2
We can find pi between square roots √9 and √10.
What is number line ?
Number line is virtual representation of numbers along with coordinates axis with number equally spaced with equal number of interval.
The value of pi is approximately 3.14 which is greater than 3 and less then 4 integer that is 3 < pi < 4
and, they are square root of 9 and 16 respectively that pi can also be corelated as √9 < pi √16. Now let us check between integers which is less then 16 it is observe that the square root of integer close to pi is 9 and 10 that is √9 < pi < √10.
Therefore, we can find pi between square roots√9 and √10.
Read more about square roots here :
#SPJ2
O 65
O 75
O100 O130
Answer:
100
Step-by-step explanation: