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
AveGali [126]
3 years ago
9

Evaluate the expression 3.14(a2 + ab) when a = 4 and b = 3

Mathematics
1 answer:
barxatty [35]3 years ago
7 0

when a=4 and b=3,

3.14((4 x 2)+ (4 x 3)) = 3.14(8+12) = 3.14 x 20 = 62.8

You might be interested in
A rectangular rug has a perimeter of 220 feet. The width of the rug is two feet less than the length. Find the length and the wi
Gekata [30.6K]

Answer:

The length is 56 and the width is 54.

Step-by-step explanation:

The perimeter of a rectangle is 2x+2y (width and length on both sides). so 2x+2y=220. Also x=y-2, because the width is 2 feet less than the length. Fill x=y-2 in 2x+2y=220 and we get 2(y-2)+2y=220. 2y-4+2y=220. 4y=216. y=54. Fill in y=54 in 2x+2y=220 and we get 2x+2(54)=220. 2x=220-2(54)=112. x=56.

7 0
3 years ago
A plane traveled 580 miles to Ankara and back. the trip there was with the wind. It took 5 hours. The trip back was into the win
Vlad1618 [11]
290 mph , its going half the speed as before. Hope this helps. 
3 0
3 years ago
A trinidadian who is planning to visit Canada changed $3192 to canadian currency. How many $ did the triodion received
DanielleElmas [232]

Answer:

$3934

Step-by-step explanation:

We know that the currency of different countries are different.

So, one US dollar = 1.23 Canadian dollar

Given : $3192

A trinidadian changed some US dollar to Canadian dollar who plans to visit Canada.

He exchanged $3192.

Therefore,

1 US dollar = 1.23 Canadian dollar

The value of $ 3192 will be equal to = 1.23 x 3192

                                                            = $ 3933.96

                                                            ≈ $ 3934

Therefore,  triodion received =  $ 3934.

8 0
3 years ago
A mouse can travel 1.5 miles a day. write an equation showing how far it travles
Vika [28.1K]
Let t = the number of days the mouse travels
Let D = the distance that the mouse traveled
The mouse travels at a rate of 1.5 miles per day, so R = 1.5 mi/day

The equation is:
Distance (D) = Rate (R) x Time (t)

SO:
Distance (D) = 1.5 mi./day X Time (t)
4 0
3 years ago
draw and label a parallelogram with a base twice as long as the height and an area less than 60 square inches. find the area
liubo4ka [24]
Answer: 5 cm by 10 cm gives an area of 50 cm^2

To do this draw a parallelogram and start by labeling the base as 10 cm. If 10 cm is the base, then the height needs to be 5 cm.

To find the area, multiply the base times height.

This will give you: 5 x 10 = 50 which is less than 60.
3 0
3 years ago
Other questions:
  • Giving 90 points please
    8·2 answers
  • gabe contributes 15% of the total cost of his individual health carecoverage. he pays $28.80 per week towards this contribution.
    7·1 answer
  • How do you work out 2/5 of 10
    14·2 answers
  • Find the slope of the line that goes through the points (-11, -19) & (-11, -10)
    12·1 answer
  • Explain the process to add two integers that have the same sign.
    11·2 answers
  • Greg spent $4 on $5 packs of sport cards. How much did greg spend on each pack?
    9·1 answer
  • A lawyer to charge her clients $310 per hour. Her new rate is $260 per hour. What was the percent of decrease in the billing rat
    8·1 answer
  • The amount of money Tricia pays for rent each month is modeled by the equation r = $20d + 100. Tricia's roomate charges a flat u
    14·2 answers
  • What is the result when 16x3 + 12x2 + 14x + 3 is divided by 4x + 1?
    15·1 answer
  • A savings account increases from ​$150 to ​$159. What is the percent increase of the savings​ account?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!