Answer:
Beau buys 7 kg of chicken for $45.50. Helen buys 10 lbs of chicken for $32.50:
To compare the prices of the chicken that Beau and Helen bought, we need to convert both measurements into the same unit. Since 1 kg = 2.20462 lbs, we can convert Beau's chicken into pounds.
7 kg x 2.20462 lbs/kg = 15.43 lb
So Beau bought 15.43 lbs of chicken for $45.50, meaning he paid:
$45.50 / 15.43 lbs = $2.95/lb
We can now compare this price to the price Helen paid for her chicken:
$32.50 / 10 lbs = $3.25/lb
So, Helen paid a higher price per pound of chicken.
Anne burns 150 calories playing 20 minutes of soccer. In 45 minutes of playing double tennis, Anne burns 306 calories:
To calculate the number of calories Anne burns per minute playing soccer and double tennis, we can divide the total number of calories burned by the time spent playing each sport:
Soccer: 150 calories / 20 minutes = 7.5 calories/minute
Double Tennis: 306 calories / 45 minutes = 6.8 calories/minute
So Anne burns slightly more calories per minute playing double tennis than she does playing soccer.
Jennifer took 40 minutes to ride her bike home from school. The distance from her house to school is 10 kilometers. If her speed remained consistent, how long did it take her to ride 8 kilometers:
To find out how long it would take Jennifer to ride 8 kilometers, we can use the formula:
time = distance / speed
We know that Jennifer's speed remained constant, so we can find her speed by dividing the distance she rode by the time it took her to do so:
speed = distance / time = 10 km / 40 minutes = 0.25 km/minute
We can now use this speed to calculate the time it would take Jennifer to ride 8 kilometers:
time = distance / speed = 8 km / 0.25 km/minute = 32 minutes
So it would take Jennifer 32 minutes to ride 8 kilometers at her constant speed.
Explanation: