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Gnoma [55]
4 years ago
9

D= 7/2 cm

Mathematics
1 answer:
kvv77 [185]4 years ago
3 0

Answer:

1) B

2) C

3) B

Step-by-step explanation:

Radius = D/2 = 7/2 × 2 = 7/4

Circumference = pi × D

= 7/2 pi

7/2 × 3.14 = 10.99

Approximately 11

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Its is about 5 km...since 18 is 1 

92/18 is 5.1 repeating so rounded to 5
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3 years ago
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At a local carnival, Mia is shooting at a row of 10 duck targets. Each time she shoots at a duck, the duck she shoots and any du
zubka84 [21]

Using the combination formula, it is found that she can shoot the ducks in 120 ways.

<h3>What is the combination formula?</h3>

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by:

C_{n,x} = \frac{n!}{x!(n-x)!}

In this problem, 3 ducks will be shoot from a set of 10, hence:

C_{10,3} = \frac{10!}{3!(10-3)!} = 120

Thus, she can shoot the ducks in 120 ways.

More can be learned about the combination formula at brainly.com/question/25821700

4 0
2 years ago
NEED HELP ASAP PLEASE HELP ASAP THANKS 15 Points
11111nata11111 [884]
<h3>Answer: 224</h3>

To get this answer, you simply multiply out all the values given. So we have 2*4*7*4 = 8*28 = 224. The reason why this works is to imagine we only had two aspects to focus on. Let's say we could only choose 2 sizes and 4 colors. Lay out a table that has 2 rows and 4 columns. This table will have 2*4 = 8 different cells inside it to represent the 8 different combinations possible. This idea can be extended to more dimensions than just two, though it might be tricky to visualize. Another way to see this is to draw out a tree diagram. Unfortunately with large numbers such as this, the tree diagram gets very unwieldy. In your math book, this concept may be referred to as the "counting principle".

4 0
3 years ago
Cuanto es 7-3{5-[6+(5-8-4)+7-(7+6-4)]+2}-6 <br><br>alguien me puede ayudar es que no se ._.​
allochka39001 [22]

Answer:

-29

Step-by-step explanation:

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3 years ago
I REALLY need help with this question please.
Natali5045456 [20]
<h3>Answer: Choice D) 281.25 mg</h3>

================================================

Work Shown:

Plug in t = 2 and we get the following

a = 500*\left(\frac{3}{4}\right)^{t}\\\\a = 500*\left(\frac{3}{4}\right)^{2}\\\\a = 500*\left(0.75\right)^{2}\\\\a = 500*0.5625\\\\a = 281.25\\\\

The answer is choice D. There are 281.25 mg of aspirin in the bloodstream after 2 hours.

-----------------

Side notes:

  • The 500 represents the initial amount of aspirin (in mg) in the bloodstream. This is the amount when t = 0.
  • The 3/4 converts to 0.75; when solving 1+r = 0.75, we get r = -0.25, and this shows a 25% reduction in aspirin each time t goes up by 1. Every hour, the amount of aspirin in the bloodstream reduces by 25%
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