Question

nolan ryan can pitch a baseball 60.5 feet in 0.6 seconds. what is his pitching speed? feet/second
calculate the speed for a car that went a distance of 125 kilometers in 2 hours time. km/hr
sarah uses 20 minutes to bicycle to her grandmothers house. her grandmothers house is 3 miles away. what is her speed? miles per minute
melanie can run 3 miles in 1 hour. what is her speed? miles per hour
the speed limit is 70 mph. a car traveled 195 miles in 2 hours. was the car speeding?
john walks 3 miles a day. he has a one - hour lunch break and walks for 30 minutes. what is his speed? miles per hour

Explanation:

Step1: Calculate Nolan Ryan's pitching speed

Use the speed formula $v=\frac{d}{t}$, where $d = 60.5$ feet and $t=0.6$ seconds. So $v=\frac{60.5}{0.6}\approx100.83$ feet/second.

Step2: Calculate the car's speed

Use the speed formula $v = \frac{d}{t}$, with $d = 125$ km and $t = 2$ hours. So $v=\frac{125}{2}=62.5$ km/hr.

Step3: Calculate Sarah's speed

Use the speed formula $v=\frac{d}{t}$, where $d = 3$ miles and $t = 20$ minutes. So $v=\frac{3}{20}=0.15$ miles per minute.

Step4: Determine Melanie's speed

Given she runs 3 miles in 1 hour, her speed is 3 miles per hour.

Step5: Check if the car was speeding

Use the speed formula $v=\frac{d}{t}$, with $d = 195$ miles and $t = 2$ hours. So $v=\frac{195}{2}=97.5$ mph. Since the speed - limit is 70 mph, the car was speeding.

Step6: Calculate John's speed

He walks 3 miles in 30 minutes (0.5 hours). Using the speed formula $v=\frac{d}{t}$, we get $v=\frac{3}{0.5}=6$ miles per hour. In miles per minute, $v=\frac{3}{30}=0.1$ miles per minute.

Answer:

Nolan Ryan's pitching speed: approximately 100.83 feet/second
Car's speed: 62.5 km/hr
Sarah's speed: 0.15 miles per minute
Melanie's speed: 3 miles per hour
Car was speeding (97.5 mph > 70 mph)
John's speed: 6 miles per hour, 0.1 miles per minute