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earnstyle [38]
3 years ago
14

Calcite the area of sphere radius 3 give your answer in 1 decimal place ​

Mathematics
2 answers:
alexgriva [62]3 years ago
5 0

Answer:

113.1 units²

Step-by-step explanation:

Surface area of sphere = 4×pi×r²

= 4 × pi × 3²

= 36pi units²

= 113.0973355 units²

= 113.1 units²

Lisa [10]3 years ago
3 0

Answer: I assume you mean surface area of a sphere.

The formula is 4πr²

If radius=3, then:

4 times \frac{22}{7} times 3²

4 times \frac{22}{7} times 9

= 113.142857

Rounded to 1 decimal place = 113.1

<u>NOTE: In place of π you can also use 3.14.</u>

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First person to answer both of these will get 10 points and Brainliest. But your answer has to be correct!​
Gnoma [55]

Answer:

The correct answer to a is 3 1/2 same answer for the other answer.

4 0
3 years ago
Read 2 more answers
Select the polynomial that is a perfect square trinomial.
cestrela7 [59]
The answer is <span>16x2 − 8x + 1
</span>
To be a perfect square trinomial, the rule must be used:
(a - b)² = a² - 2ab + b²

Let's check all choices
A. a = 7x, b = 4
(7x - 4)² = 49x² - 56x + 16

B. a = 2a, b = 5
(2a - 5)² = 4a² - 20a + 25

C. a = 5b, b = √10
(5b - √10)² = 25b² - 10√10 b + 10

D. a = 4x, b = 1
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CORRECT
3 0
3 years ago
Read 2 more answers
On which attempts was his time less than 60 seconds?
adelina 88 [10]

Answer:

4 6 and 7?

Step-by-step explanation:

all you have to do is find 60 sec mark and all attempts bellow it are below 60 sec or under 60 sec

5 0
3 years ago
20.There is an 80% chance David will eat a healthy breakfast and a 25% chance that it will rain. If these events are independent
Mariulka [41]

Answer:

A. 20%

Step-by-step explanation:

These events are independent, because if David eats a healthy breakfast cannot influence on would be rain or not.

"And" for probabilities  of independent events means "x" (times).

80% = 0.8

25% = 0.25

0.8*0.25 = 0.2 = 20%

4 0
3 years ago
Mary loves eating fruits.Mary paid $7.98 for each of 2 berries and $ 5.99 for 3 peaches with 2 $20 dollars.How much change did M
kupik [55]

Answer:

6.07

Step-by-step explanation:

We know that Mary has two twenty dollar bills, equaling to forty dollars in total.

So lets start on the first few things she buys, the berries, each costing 7.98 dollars and cents, since she only bought two, that means we need to multiply 7.98 by 2

==> 15.96 dollars and cents

Now we can take it out of forty.

    $ 40.00

-    $ 15.96

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

    $24.04

Now we only have 24.04 dollars and cents.

Now for the next few items, the peaches which costs 5.99 each, then since he only bought 3, we multiply 5.99 three times.

==> 17.97 dollars and cents

Now we can take it out of 24.04.

     $24.04

-     $ 17.97

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

      $6.07

Mary has 6 dollars and 7 cents in change.

5 0
3 years ago
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