Answer:
Step-by-step explanation:
Let x represent his average walking speed.
If the average speed on the bike is 8 mph faster than his walking speed,it means that his biking speed is (x + 8) mph
Distance = speed × time
Alex returns a bike to a friends house from his own house in 1/2 hour. This means that the distance covered is
0.5(x + 8)
He walks back over the same route in 1.5 hours. This means that the distance covered is
1.5x
Since the distance covered is the same, then
1.5x = 0.5(x + 8)
1.5x = 0.5x + 4
1.5x - 0.5x = 4
x = 4 mph
Therefore, the distanceof Alex's house from his friend's house is
4 × 1.5 = 6 miles
Answer: 12.001 ft is the radius
Step-by-step explanation:
Volume of sphere is calculated by following formula:
V = 4/3 pi r³
Putting values
7234.56 = 4/3 × 3.14 ×r³
Simplifying
7234.56 = 4.186 ×r³
Rearranging the equation
r³ = 7234.56/4.186
r³ = 1728.28
Taking cube root on both sides
r = 12.001
50/15=3.33333
3.33333x18=60
Answer: 60 miles
Using a 1-sample z-interval for the population proportion with confidence level 0.997, the sample probability is 0.69 with margin of error of 0.16, so between 0.69+0.16=0.85 of the population and 0.69-0.16=0.53 of the population prefers coffee. 84% and 54% are the correct answers.
Answer:
its b and e
Step-by-step explanation:
i took the test
