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REY [17]
3 years ago
13

Work out the TOTAL surface area of this hemisphere which has a radius of 8cm?

Mathematics
1 answer:
Sliva [168]3 years ago
3 0

Answer:

603.2cm²

Step-by-step explanation:

SAshpere=4πr²

SAhemi=2πr²+πr²

2πr²+πr²=3πr²

3×π×8²=192π

=603.2cm²

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Prove sums of angles in a triangle is 180 degree
goldfiish [28.3K]

Answer:

because a triangle has 3 sides and has 3 angles

so each angle on a equilateral triangle has 60 degrees which means

  60 x 3 = 180

Step-by-step explanation:

because a triangle has 3 sides and has 3 angles

so each angle on a equilateral triangle has 60 degrees which means

  60 x 3 = 180

6 0
3 years ago
30 POINTS!!!
Nataliya [291]

Answer:

  115

Step-by-step explanation:

The measure of x is half the sum of the intercepted arcs. The arc on the left is a semicircle, so 180°.

The arc on the right is the difference between 180° and the two arcs shown, 60° and 70°, so is 180° -60° -70° = 50°.

Then half the sum of the intercepted arcs is ...

  x° = (180° +50°)/2 = 230°/2 = 115°

  x = 115

5 0
3 years ago
The football team has 30 more members than the basketball teams. If each group had 10 more members, the ratio of their membershi
PIT_PIT [208]

<span>the football team has 30 more players than the basketball team, so the number of players on the football team is x= 30 + y.

Then you have to add on the extra ten players to each team so that the ratio fits. Now the football team is </span>

<span>10 + 30 + y (or 40 + y) and the basketball team is 10 + y.

Next you need to divide the ratio by its respective parts since a third of the football team is equal to half of the basketball team. So you end up with this equation:

(40 + y)/3 = (10 + y)/2

multiply the three over to the other side to cancel it out. Same with the two. So, now the equation is:

80 + 2y = 30 + 3y

Subtract the 30 from the 80 and the 2y from the 3y and you have your answer: y = 50.

Go back up to the top where you found out that x = 30 + y and put the 50 in place of the y, giving you x = 80</span>
3 0
3 years ago
Ed earns $40 washing 5 windows. At this rate, how much does Ed earn washing 8 windows?​
Nimfa-mama [501]

Answer:

Edd would earn 64 dollars for cleaning 8 windows

Step-by-step explanation:

40/5 = 8

8 x = 64

Ed would earn $64

May I have brainliest please? :)

7 0
3 years ago
Read 2 more answers
I REALLY NEED HELP!!!<br> 5^-3=
stiv31 [10]
1/125 or 0.008
fraction or decimal
3 0
3 years ago
Read 2 more answers
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