1 year ago

Which number is a perfect cube? 21 49 343 600

Mathematics

1 answer:

artcher [175]1 year ago

6 0

Answer:

343

Step-by-step explanation:

7 cubed = 7 x 7 x 7 = 343

so, 343 is a perfect cube.

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In the square below, the two semi-circles are congruent. Find the area of the shaded region. If necessary, round your answer to

Jobisdone [24]

Let's start with the area of the square
$area \: square = s \times s = 8 \times 8 = 64$
now let's subtract the are of the two half circles.
two half circles are the same as one circle, and we know that the diameter of the circle is 8 (same as the side of a square) so it's radius is 8/2= 4 inches

$area \: circle = \pi {r}^{2} = \pi \times {4}^{2} = 16\pi$
now we just subtract and our answer is

$64 - 16\pi = 64 - 16 \times (3.14) = 13.73$

3 0

3 years ago

1.<br> Use trigonometry to work out the value of x.<br> Not drawn accurately. <br> Help pls

tino4ka555 [31]

Answer:

20cos(39) or 15.543 (3 d.p.)

Step-by-step explanation: