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AVprozaik [17]
3 years ago
7

What is the difference in average speed between two cars, one that traveled 160 kilometers in 5 hours, and the other that travel

ed 140 kilometers in the same time? Record and bubble your answer below.
Mathematics
2 answers:
liberstina [14]3 years ago
6 0

Answer:

4

Step-by-step explanation:

KonstantinChe [14]3 years ago
3 0

Answer:

The difference in average speed between two cars, one that traveled 160 kilometers in 5 hours, and the other that traveled 140 kilometers in the same time is:

2 km/h.

Step-by-step explanation:

a) Data and Calculations:

Let A = first car and B = second car

Distance traveled by first car = 160 kilometers (km)

Distance traveled by second car = 140 kilometers

Time taken by each car = 5 hours

Speed of A = 160/5 = 32 km/h

Speed of B = 150/5 = 30 km/h

Difference in speed =  2 km/h (32 - 30)

b) The average speed of a car is given by the distance traveled divided by the time taken to travel the distance.  The speed here is expressed in kilometers per hour (km/h).  It can also be expressed in meters per hour or second, etc.

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See the picture below
mart [117]

Answer:

a) 301.59 cubic centimeters

b) 235.87 square centimeters

Step-by-step explanation:

a)

Volume of ice cream cone is volume of hemisphere PLUS volume of cone.

Volume of Hemisphere = \frac{\frac{4}{3}\pi r^3}{2}

radius is given as 4, so,

Volume of Hemisphere = \frac{\frac{4}{3}\pi r^3}{2}\\=\frac{\frac{4}{3}\pi (4)^3}{2}\\=134.04

Now, Volume of Cone = \frac{1}{3}\pi r^2 h

Where radius is 4 and height is 10, so,

Volume of Cone = \frac{1}{3}\pi r^2 h\\=\frac{1}{3}\pi (4)^2 (10)\\=167.55

Volume of Ice Cream Cone = 134.04 + 167.55 = 301.59 cubic centimeters

b)

Surface area of ice cream cone is surface area of hemisphere PLUS surface area of cone.

Surface Area of Hemisphere = 2\pi r^2\\=2\pi (4)^2\\=100.53

Surface Area of Cone = \pi r^2+\pi rl

We dont need to use the first part, \pi r^2  since it is "inside". We  need to find l, slant height, by using pythagorean theorem on a triangle we can make (bottom right).

4^2 + 10^ 2 = l^2

16 + 100 = l^2

116 = l^2

l = 10.77

Now to find the surface area of cone = \pi rl\\=\pi (4)(10.77)\\=135.34

Surface area of ice cream cone = 100.53 + 135.34 = 235.87 square centimeters

5 0
3 years ago
Can an angle that has a supplement also h ave a complement; always sometimes or never
Romashka [77]
Sometimes
for example a 30 degree angle has a 60 degree angle as its complement and a 150 degree angle as its supplement.

if you choose a 90 degree angle it can only have a supplement
if you choose a 180 degree angle it can't have either

hope this helps
8 0
3 years ago
Amia went to a flower farm and picked f flowers. When she got home, she put the flowers in 4 vases, with 22 flowers in each vase
Whitepunk [10]
One equation that represents this situation is f/4 = 22.

This shows the total number of flowers (f) being broken into 4 groups (4 vases) with the result being 22 flowers in each vase.
7 0
3 years ago
Read 2 more answers
What is the probability of choosing a burrito with cheese and a taco or wrap with salsa??
quester [9]

Answer:

nothing is wrong with it

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
How many different 4 digit numbers are there that are only made up of even digits
malfutka [58]
In a four-digit number, the first digit cannot be 0, so there are only 4 even numbers available. For the second, third, and fourth digits, there are 5 available numbers. Thus, the number of 4-digit numbers containing only even digits is 4 x 5 x 5 x 5 = 500 numbers.
8 0
3 years ago
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