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labwork [276]
3 years ago
12

You might need:

Mathematics
1 answer:
joja [24]3 years ago
4 0
Stars form from an accumulation of gas and dust, which collapses due to gravity and starts to form stars. The process of star formation takes around a million years from the time the initial gas cloud starts to collapse until the star is created and shines like the Sun.Jul 4, 2019
You might be interested in
Cellular phone service that charges per-minute will charge $70 for 270 minutes. How much would 1260 minutes cost? Round your ans
gulaghasi [49]
$70 = 270 min
x = 1260 min
Where x is the charge of phone service per 1260 min.

Cross multiply:
1260 * 70 = 270 * x
88200 = 270x
88200/270 = x
x = 326.67

The total charge of cellular phone service for 1260 min is $326.67
6 0
3 years ago
Two fifths of the children in the nursery were boys. What was the ratio of boys to girls in the nursery?
Shtirlitz [24]
The answer would be 2:3
6 0
3 years ago
Uhm can i get a brain dump moment right here(btw i pick a random subject)
kolezko [41]

Answer:

liquid

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
the art teacher is sending home a total of 3,150 projects before winter break if each of her 150 students had the same number of
Alenkinab [10]

Answer:

21 projects each

Step-by-step explanation:

3150 ÷150

4 0
3 years ago
Find the area of this regular polygon.<br> Round to the nearest tenth.<br> 8.65 mm<br> [? ]mm2
nadezda [96]

Answer:

Actually it's not polygon. it's a nonagon. With r=8.65mm″, the law of cosines gives us side a:

a=√{b²+c²−2bc×cos40°}

a=√{149.645−149.645cos40°}

Area Nonagon = (9/4)a²cos40°

=9/4[149.645−149.645cos40°]cot20°

=336.70125[1−cos(40°)]cot(20°)

Applying an identity for the cos(40°) does not get us very far…

= 336.70125[1−(cos2(20°)−1)]cot(20°)

= 336.70125[2−cos2(20°)]cot(20°)

= 336.70125[2−(1−sin2(20°))]cot(20°)

= 336.70125[1+sin2(20°)]cos(20°)sin(20°)

= 336.70125[cot(20°)+sin(20°)cos(20°)]mm²

3 0
3 years ago
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