95 Answered Questions for the topic rate

04/28/19

Calculus Study Guide Help:

I need help answering the following questions from my study guide: When a circular plate of metal is heated in an oven, its radius increases at a rate of 0.03 cm/min. At what rate is the plates... more

04/04/19

Interest rate problem

What interest rate compound monthly will yield an effective interest rate of 8%?

03/18/19

The air in a room with volume 180m^3

The air in a room with volume 180 m3 contains 0.45% carbon dioxide initially. Fresher air with only 0.05% carbon dioxide flows into the room at a rate of 2 m3/min and the mixed air flows out at the... more

12/04/18

My mom walks 5/6 of a yard every minute.what is my mom rate in yard per minute

My grandma walks 5/6 of a yard every 4/12 minute what is my grandma rate in yards per minute

10/28/18

Rate of Change for the value of y

If y'(8)=1/12, how much would you think y would change between x=8 and x=8.12? (Hint: y' measures the rate of change of y per unit of change of x)I tried to use y2-y1/x2-x1 and set it equal to 1/12... more

10/22/18

Distance Rate and Time Problem

Joan left Durham with a speed of 47 mph. Sam also left at the same time in the opposite direction at a speed of 41 mph. Find how many hours Sam must travel for them to be 228 miles apart?NOTE: I... more

10/05/18

A clock was exactly on time at noon on Monday. At 8 P.M. on Tuesday it was 64 seconds slow. At that same rate, how much did it lose in 1/2 hour?

A clock was exactly on time at noon on Monday. At 8 P.M. on Tuesday it was 64 seconds slow. At that same rate, how much did it lose in 1/2 hour?

10/02/18

Word problem

Two cars traveled equal distances in different amounts of time. Car A traveled the distance in 2.4 h, and Car B traveled the distance in 4 h. Car A traveled 22 mph faster than Car B. How fast did... more

09/23/18

How long would it take to fill a 20L container in a rate of 83ml/s

Need some help I’m in year 8 and would like the working out to be as simple as possible for my year.

08/06/18

which of the following equations, when solved for t, gives the number of seconds Jean will take to catch up to Sula?

during their morning jog in the park, jean stops at a drinking fountain. Sula continues to jog and gets 10 meters ahead of jean. sula is jogging at a constant rate of 2 meters per second, and jean... more

05/09/18

A room has 300 feet of wall space to paint. Sam says it took her 10 minutes to paint 25 square feet. At this rate how many hours would it take Sam to paint?

Please help. dont rly understand and need to know! Thanks for helping out

04/09/18

f Rachael rides for 12 hours on a bicycle, what is her rate if she rides for 84 miles?

if Rachael rides for 12 hours on a bicycle, what is her rate if she rides for 84 miles?

04/06/18

work out daniel's petrol cost

the cost of petrol is $1.36 per litre.Petrol flows into the tank of a car at a rate of 1.45 litres per second.Daniel puts petrol into his car for half a minute. Work out the cost of Daniel's petrol.

02/06/18

How do I solve a problem where I know a barrel holds 50 gallon and every 17 minutes .4 gallons leaks when will the barrel be empty

Trying to figure out when a barrel will be empty if it holds 50 gallons and leaks .4 gallons every 17 minutes

01/30/18

I need help in finding the rate.

Luis can run 10 kph faster than Greta. One day,each of them left their house and ran towards each other. If the distance between them was 43.5 km and they met in 45 minutes, what was their rate?

01/06/18

How do I solve this? (question too long)

The top of a 15-foot-long ladder rests against a vertical wall with the bottom of the ladder on level ground, as shown above (it's just a ladder leaning against a wall). The ladder is sliding down... more

11/27/17

A population of bacteria is growing at the rate of 2.3% per minute.

6. A population of bacteria is growing at the rate of 2.3% per minute. Calculate how long it will take for the size of the population to double. Give your answer to the nearest minute.

10/28/17

Two bikers are 11 miles apart and walking toward each other. They meet in 2 hrs. Find the ratebof each hikerif one hiker walks 1.1 mph fater than the other

Two bikers are 11 miles apart and walking toward each other. They meet in 2 hrs. Find the ratebof each hikerif one hiker walks 1.1 mph fater than the other

10/22/17

Gabriel can finish a packet of cereal in 6 days. The next packet of identical cereal he shares with his sister Sheila, and the two of them take 4 days to finish

Gabriel can finish a packet of cereal in 6 days. The next packet of identical cereal he shares with his sister Sheila, and the two of them take 4 days to finish the packet. If Sheila alone had been... more

10/04/17

If the rate of the boat in still water is 12mph, and the rate of the current of a river is x​ mph, what is the rate of

If the rate of the boat in still water is 12mph, and the rate of the current of a river is x mph, what is the rate of the boat in each case? a) The boat is going upstream (that is, against the... more

09/21/17

Solving a distance, rate, time problem using a linear equation.

Tom drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 9 hours. When Tom drove home, there was no traffic and the trip only took 4 hours. If his... more
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