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dalvyx [7]
3 years ago
11

) Find the area of a circle with radius, r = 53cm.Give your answer rounded to 3 SF.​

Mathematics
1 answer:
lina2011 [118]3 years ago
6 0
Area of a circle = pi r^2
= 3.14 x 53^2
= 3.14 x 2809
Area of circle = 8820.26 cm^2

Therefore area of circle to 3 significant figures is 8820 cm^2
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The point (-3, 6) is on a line with a slope of 4.
postnew [5]

Answer:

51

Step-by-step explanation:

The caty

7 0
3 years ago
6 / 712 / 15 which one is greater and how do I explain it
Aleks04 [339]

Answer:

Greater fraction is

\frac{6}{7}

Step-by-step explanation:

we are given two fractions

\frac{6}{7}   and \frac{12}{15}

First fraction:

\frac{6}{7}

Second fraction:

\frac{12}{15}

We can simplify it

\frac{12}{15}=\frac{3\times 4}{3\times 5}

\frac{12}{15}=\frac{4}{5}

To compare them , firstly we should make common denominator

denominators are 7 and 5

so, common denominator is

=7\times 5=35

now, we can make each denominator as 35

\frac{6}{7}=\frac{6\times 5}{7\times 5}

\frac{6}{7}=\frac{30}{35}

\frac{4}{5}=\frac{4\times 7}{5\times 7}

\frac{4}{5}=\frac{28}{35}

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so, we can see that both fractions have common denominator =35

and greater numerator is 30

so,

Greater fraction is

\frac{6}{7}


7 0
4 years ago
The probability that a car has a certain factory defect is 825. The probability that a car has a certain factory defect and need
ipn [44]

Answer:

90.91% probability that a car needs an oil change given that it has a certain factory defect

Step-by-step explanation:

We use the conditional probability formula to solve this question. It is

P(B|A) = \frac{P(A \cap B)}{P(A)}

In which

P(B|A) is the probability of event B happening, given that A happened.

P(A \cap B) is the probability of both A and B happening.

P(A) is the probability of A happening.

In this problem, we have that:

Event A: having a factory defect.

Event B: needing an oil change.

The probability that a car has a certain factory defect is 825.

So P(A) = 0.825

The probability that a car has a certain factory defect and needs an oil change is 750.

So P(A \cap B) = 0.75

What is the probability that a car needs an oil change given that it has a certain factory defect

P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.75}{0.825} = 0.9091

90.91% probability that a car needs an oil change given that it has a certain factory defect

5 0
4 years ago
julie started with 20 pieces of gum and gave away x pieces. Karen started with 35 pieces of gum and gave away twice as many as j
liq [111]

Answer:

15

Step-by-step explanation:

If you replace each answer choice with the varibale, (x) then 15 would be the only choice that fits properly.

Equation:

20-x = 35-(2x)

when replacing 15 with x this is your new equation...

20-15 = 35-(2x15)

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5=5

6 0
4 years ago
Find the sum of 51 - 3x2 + 5 and -2x + 6x2 - 5.<br><br> Can you help me with this problem
zaharov [31]

Answer: 52+5 adn - 2x

7 0
3 years ago
Read 2 more answers
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