Question

1. how many kilograms of calcium are there in 173 pounds of calcium? (1 lb = 454 g; 1 kg = 1000 g)

78500 kg
110 kg
78.5 kg
1.10 kg

1. convert 62 miles/hour to feet/second. (5,280 ft = 1 mi)

909 ft/s
91 ft/s
.003 ft/s
5,456 ft/s

Explanation:

Question 8

Step1: Convert pounds to grams

We know that \( 1 \text{ lb} = 454 \text{ g} \), so for 173 pounds, we calculate the grams as \( 173 \times 454 \) g.
\( 173\times454 = 78542 \) g

Step2: Convert grams to kilograms

Since \( 1 \text{ kg} = 1000 \text{ g} \), we divide the grams by 1000 to get kilograms.
\( \frac{78542}{1000}=78.542\approx78.5 \) kg

Step1: Convert miles to feet

We know that \( 1 \text{ mi} = 5280 \text{ ft} \), so 62 miles is \( 62\times5280 \) ft.
\( 62\times5280 = 327360 \) ft

Step2: Convert hours to seconds

We know that \( 1 \text{ hour} = 3600 \text{ seconds} \)

Step3: Calculate feet per second

To find feet per second, we divide the number of feet by the number of seconds in an hour.
\( \frac{327360}{3600}=90.933\approx91 \) ft/s

Answer:

78.5 kg

Question 9