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
Usimov [2.4K]
3 years ago
13

Evaluate the expression 3.14(a^2 + ab) when a = 3 and b = 4

Mathematics
2 answers:
otez555 [7]3 years ago
7 0

Answer:

ASK YOUR QUESTION

Middle School  Mathematics  5+3 pts

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

Report 13.07.2017

Answer

3.14(a^2 + ab) when a = 3 and b = 4

then

3.14(3^2 + 3*4)

= 3.14(9+12)

= 3.14(21)

= 65.94

15

Step-by-step explanation:

masya89 [10]3 years ago
5 0

Answer:

the answer is 21 <em>pi.</em>

Step-by-step explanation:

You might be interested in
Last night, Roberto spent 90 minutes doing homework, infinity symbol hour reading, and 540 seconds making his lunch for the next
Margarita [4]

Answer:

41 minutes

Step-by-step explanation:

We are given;

Time spent on homework = 90 minutes

Time spent reading = 2/3 hours = 2/3 × 60 minutes = 40 minutes

Time spent making lunch = 540 seconds = 540/60 minutes = 9 minutes

We want to find how many more minutes Roberto spent doing homework than he did reading and making his lunch.

Thus;

Time spent on reading and making lunch = 40 + 9 = 49 minutes

Hence, the word "how many more" means we will subtract 49 from 90.

So, "how many more minutes" = 90 - 49 = 41 minutes

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
There are approximately 3.2 x 10^7 mosquitoes near each backyard pool. How many total mosquitoes are thre in a city with 6.7 x 1
dexar [7]

Answer:

Step-by-step explanation:

Alright, lets get started.

There are approximately 3.2 \times 10^7 mosquitoes near each backyard pool.

The city has total number of pools 6.7 \times 10^{12}.

So the total mosquitoes will be : 3.2 \times10^7 \times6.7\times 10^{12}

So the total mosquitoes will be : 21.44 \times 10^{19}

So the total mosquitoes will be : 2.144 \times 10^{20}  :   Answer

Hope it will help :)

3 0
3 years ago
Rachel's chocolate bar is 43% cocoa. If the weight of the chocolate bar is 68 grams, how many grams of cocoa does it contain? Ro
Yanka [14]

Answer:

29.24 grams

Step-by-step explanation:

It is given that,

Rachel's chocolate bar is 43% cocoa

The weight of the chocolate bar is 68 grams

We need to find how many grams of cocoa does it contain. It means it will contain 43% of 68 grams. It can be solved as follows :

C=\dfrac{43}{100}\times 68\\\\C=29.24\ \text{grams}

Hence, it will have 29.24 grams of cocoa.

7 0
3 years ago
A satilitle makes 4 revolutions in one day. How many revolutions would it make in 6 1/2 days
Oksana_A [137]
26 Revolutions in 6 1/2 days.
7 0
3 years ago
Loli-Land Candy Store sells a 12 ounce bag of 60 mints. What is the number of mints per ounce?
Vsevolod [243]
5 because you have to divide 60 by 12.
6 0
3 years ago
Other questions:
  • Omari drives a car that gets 18 miles per gallon of gasoline. The car's gasoline tank holds 15 gallons. The distance Omari drive
    7·1 answer
  • PLZ HELP ME
    15·1 answer
  • Question #11: What is the value of C ?
    7·1 answer
  • Help. I got it wrong and have no clue how to get to the right answer!
    8·1 answer
  • Find the vertices and locate the foci for the hyperbola whose equation is given. 49x2 - 100y2 = 4900
    7·1 answer
  • Please help I don't know how to do this
    7·1 answer
  • What polyhedron can be formed from a net diagram that has 2 congruent hexagons and 6 congruent rectangles?
    9·2 answers
  • -5[4-(-3)(2)] how to solve this
    6·2 answers
  • T
    12·1 answer
  • Asap help please ill mark brainlist
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!