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
asambeis [7]
3 years ago
11

Evaluate the expression 3.14(a2 + ab) when a = 4 and b = 3. (Input decimals only, such as 12.71, as the answer.

Mathematics
2 answers:
bezimeni [28]3 years ago
7 0

Answer:

<h2><em>8</em><em>7</em><em>.</em><em>9</em><em>2</em></h2>

<em>Given,</em>

<em>a</em><em>=</em><em>4</em>

<em>b</em><em>=</em><em>3</em>

<em>Nowz</em>

<em>3.14( {a}^{2}  + ab) \\  = 3.14( {4}^{2}  + 4 \times 3) \\  = 3.14(16 + 12) \\  = 3.14 \times 28 \\  = 87.92</em>

<em>hope</em><em> </em><em>this</em><em> </em><em>helps</em><em> </em><em>.</em>

<em>Good</em><em> </em><em>luck</em><em> on</em><em> your</em><em> assignment</em><em>.</em><em>.</em><em>.</em>

kondaur [170]3 years ago
6 0

Answer:

87.92

Step-by-step explanation:

3.14(a²+ab)=

<em>Plugging in values for a and b</em>

3.14(4²+4×3)=

3.14(16+12)=

3.14(28)=

87.92

You might be interested in
Three to the power of negative two
Yanka [14]

Answer:

1/9

Step-by-step explanation:

3^-2 = 1/3^2

1/3^2 = 1/9

4 0
3 years ago
Jacob made a banner for a sporting event in the shape of a parallelogram. The area of the banner is 127 1/2 square centimeters.
MAVERICK [17]

Answer:30

Step-by-step explanation: its 30 because you divide 127 1/2 or 127.5 by 4.25 or 4 1/4.

4 0
3 years ago
A can in the shape of a right circular cylinder is required to have a volume of 500 cubic centimeters. The top and bottom are ma
borishaifa [10]

Answer:

The answer to the question is

The total cost C of the material as a function of the radius r of the cylinder is

0.6912·r² + 800/r Dollars.

Step-by-step explanation:

To solve the question, we note that

The area of the top and bottom combined  = 2·π·r²

The area of the sides = 2·π·r·h

and the volume = πr²h = 500 cm²

Therefore height = 500/(πr²)

Substituting the value of h into the area of the side we have

Area of the side = 2πr·500/(πr²) = 1000/r

Therefore total area of can = Area of top + Area of bottom + Area of side

Whereby the cost of the can = 0.11×Area of top +0.11×Area of bottom +0.8×Area of side

Which is equal to

0.11×2×π×r²+ 0.8×1000/r = 0.6912·r² + 800/r

The cost of the can is $(0.6912·r² + 800/r)

3 0
3 years ago
3 times the sum of x and y squared plus 5 times the difference of 2x and y
Virty [35]
3x + xy^2 + 5x - 2xy     ok so once you can decode the sentence this is what it will look like.    First you add the common facts which are 3x and 5x which = 8x ok so now we have 8x + xy^2 - 2xy so then I believe you cant do anything after that because there will be no more common factors hey can you tell me if I am write if you have already had turn this in please hope this helps 
8 0
3 years ago
What is the domain of this graph?
professor190 [17]

Answer:

B

Step-by-step explanation:

The answer is b because the domain of anything is always x or on the x axis .

7 0
3 years ago
Read 2 more answers
Other questions:
  • Suppose you take $25,000 and deposit some of it into a savings account that pays 2.2% interest. You then take the rest of the mo
    6·1 answer
  • Answer asap for brainliest
    11·2 answers
  • Miguel and Grace started collecting rare coins at the same time. Back then, they had the same number of rare coins. Miguel has b
    7·1 answer
  • Kathy lives directly east of the park. The football field is directly south of the park. The library
    9·1 answer
  • Solve for x.<br> 3х - 4 = 13
    11·2 answers
  • GEOMETRY HELP PLEASE!! WILL MARK BRAINLEIST!<br> 5
    15·2 answers
  • A group of 8 people went out to lunch. The amount earn spent is shown in the table, Amount Spent Person on Lunch Brandon $12.00
    9·1 answer
  • Please, show some work
    5·2 answers
  • Please help :(<br> The complement of an angle is 36º. What is the measure of the angle?
    11·1 answer
  • Given the position of the particle, what the position(s) of the particle when it’s at rest
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!