1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
saw5 [17]
3 years ago
12

If D varies directly with t and D is 105 when t is 3, find D when t is 8. 35 280 840

Mathematics
2 answers:
drek231 [11]3 years ago
5 0

Answer:

280

Step-by-step explanation:

D = kt

105 = 3k

k = 35

D = 35t

D = 35(8) = 280

zhenek [66]3 years ago
5 0

Answer:

440

Step-by-step explanation:

Let the variation factor be 'k'

D = kt

When D is 105, and t is 3

105 = 3k

Divide through by 3 to get the value for 'k'

105/3 = 3k/3

k = 55.

When t = 8,

D = 55 x 8

D = 440

You might be interested in
The radius of a sphere is 7 cm. What is the sphere's volume? Round to the nearest tenth, and use 3.14 for π.
Leokris [45]

Answer:

1,436.8

Step-by-step explanation:

5 0
2 years ago
Brady rode his bike 70 miles in 4 hours. He rode at an average speed of 17 miles per hour for t hours and at an average rate of
IceJOKER [234]

Answer:

Brady rides at slower speed which is 17 miles/hours for <em><u>3 hours and 36 minutes.</u></em>

Step-by-step explanation:

Given:

Brady rode 70 miles in 4 hours.

For t hours he rode at the average rate of 17 miles/hour

For rest of the time he rode at the average rate of 22 miles per hour.

To find the time Braady rode at the slower speed.

Solution:

Total time of riding = 4 hours

Time for which Brady rides at 17 miles/ hour = t  hours

Distance covered in t hours = Speed\times time=17\times t =17t\ miles

So, time for which Brady rides at 22 miles/ hour = (4-t) hours

Distance covered in (4-t) hours = Speed\times time=22\times(4-t) =(88-22t)\ miles

Total distance can be given as:

⇒ 17t+88-22t

Simplifying.

⇒ -5t+88

Total distance given =70 miles.

Thus, the equation to find t can be given as:

-5t+88=70

Subtracting both sides by 88.

-5t+88-88=70-88

-5t=-18

Dividing both sides by -5.

\frac{-5t}{-5}=\frac{-18}{-5}

∴ t=3.6 hours

3.6\ hours = 3\ hour+ (0.6\times 60)\ minutes = 3\ hour\ 36\ minutes

Thus, Brady rides at slower speed which is 17 miles/hours for 3 hours and 36 minutes.

6 0
3 years ago
A science experiment involves periodically measuring the number of mold cells present on a piece of bread. At the start of the e
fomenos

Answer:

  • y = 50·3^x
  • (2, 450), (3, 1350), (4, 4050), (5, 12150)

Step-by-step explanation:

The problem statement tells you each observed count is 3 times the last one.

__

Expressed as an exponential function with an initial value of 50 and a growth factor of 3, the formula is ...

  y = (initial value)×(growth factor)^x

  y = 50·3^x

3 0
3 years ago
John works a fortnightly wage of $750.00. If his basic week is 40 hours. what is his: Weekly wage basic rate and basic fortnight
Vladimir [108]

Answer:

Basic wage rate = $9.375 per hour

Step-by-step explanation:

Given :

Fortnight wage = $750

Basic week, hours worked per week = 40 hours

Weekly basic wage rate :

Fortnight = 2 weeks

Hence, weekly wage = fortnight wage / 2 = 750 /2 = $375

Weekly basic wage rate = $375 / Number of hours worked per week = $375 / 40 = $9.375 per hour

4 0
3 years ago
On the number line, Point B is between points A and C . The distance between points A and B is 1/3 of AC. What is AB?
sasho [114]

I think the answer is b

I think the answer is b

I think the answer is b

I think the answer is b

4 0
3 years ago
Read 2 more answers
Other questions:
  • What is 1/35 X 15?<br><br>isn't it 3/7?
    14·1 answer
  • (83.9x10^12)(2.87x10^-3)/ 3.76x10^2
    12·1 answer
  • Which expression represents a rational number?
    14·2 answers
  • Please help I will mark branlest if you are right
    7·1 answer
  • a recipe make 2 1/2 cups of homemade jam how many cups of homemade jam do you get from 3 batches of the recipes
    7·2 answers
  • Ms. Brown's class is learning about banks, so she creates one in her classroom. All students start with $75 in their accounts. L
    11·1 answer
  • YA
    9·1 answer
  • A curtain company has 1,787 yards of fabric to make identical curtains. If each curtain requires 6.5 yards of fabric, how many c
    11·1 answer
  • Rick buys a spatula costing $2.23. He gives the cashier $5.00. The cashier gives him his change using the least number of coins
    6·1 answer
  • Louise Tammy Dolores and Cheryl score 78 points in the tennis matches they play. A score consecutive number of points from small
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!