Question

nolan ryan can pitch a baseball 60.5 feet in 0.6 seconds. what is his pitching speed? 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 minute a train covers a distance of 480 mi in 8 hours. what is the speed of the train? miles per hour

Explanation:

1. Nolan Ryan's pitching speed:

Step1: Recall speed formula

Speed $v=\frac{d}{t}$, where $d$ is distance and $t$ is time. First convert feet - to - miles and seconds - to hours. 1 mile = 5280 feet, so 60.5 feet $=\frac{60.5}{5280}$ miles. 1 hour = 3600 seconds, so 0.6 seconds $=\frac{0.6}{3600}$ hours.

Step2: Calculate speed

$v=\frac{\frac{60.5}{5280}}{\frac{0.6}{3600}}=\frac{60.5\times3600}{5280\times0.6}=\frac{217800}{3168}=69$ miles per hour.

2. Car's speed:

Step1: Use speed formula

Speed $v = \frac{d}{t}$, where $d = 125$ kilometers and $t=2$ hours.

Step2: Calculate speed

$v=\frac{125}{2}=62.5$ km/hr.

3. Sarah's speed:

Step1: Apply speed formula

Speed $v=\frac{d}{t}$, with $d = 3$ miles and $t = 20$ minutes. Since we want the speed in miles per minute, we directly calculate.

Step2: Calculate speed

$v=\frac{3}{20}=0.15$ miles per minute.

4. Melanie's speed:

Answer:

1. Nolan Ryan's pitching speed: 69 miles per hour
2. Car's speed: 62.5 km/hr
3. Sarah's speed: 0.15 miles per minute
4. Melanie's speed: 3 miles per hour
5. Car - speeding check: Yes, the car was speeding
6. John's speed: 6 miles per hour, 0.1 miles per minute
7. Train's speed: 60 miles per hour