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Advocard [28]
3 years ago
11

Do any of y’all know this!

Mathematics
1 answer:
gregori [183]3 years ago
5 0

Answer:

no i dont  

Step-by-step explanation:

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Do the collection of favourite colours form a set?​
seraphim [82]

Answer:yes

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
A battery was charged. When the charging began, it was 23 percent full. After 30 minutes of charging, the battery was 89 percent
AfilCa [17]

QUESTION:

A battery was charged. When the charging began, it was 23 percent full. After 30 minutes of charging, the battery was 89 percent full. how fast did the battery charge and how long did it take?

Solution :

<u>Given</u>

  • Initial amount of charge = 23%
  • Amount after charge = 89%

<u>procedu</u><u>re</u>

Let the rate of charging be r .

r = (change in charge level) / (time interval) = (89% - 23%) / (30 min) = 2.2 % per minute

charge = (rate of charging)(time) + (initial charge)

100% = r*t + 23%

100% = (2.2 %/min)t + 23%

Solve for t and get

t = [(100 - 23) / 2.2]

Answer = 35 min

7 0
4 years ago
Help with this please.
spin [16.1K]
The answer would be because
7 0
3 years ago
The arm and blade of a windshield wiper have a total length of 30 inches. The blade is 24 inches long and the wiper sweeps out a
Ipatiy [6.2K]

Answer:

942.5 in²  

Step-by-step explanation:

The formula for the area (A) of a sector of a circle is

A = ½r²θ

where θ is the angle in radians.

1. Convert the angle to radians

θ = 125°  

\theta = 125^{\circ} \times \dfrac{\pi \text{ rad }}{180^{\circ}} =\frac{25}{36} \pi\text{ rad}

2. Area swept out by wiper arm

A = ½r²θ = ½ × (30 in)² × θ = ½ × 900 in²× θ = 450 θ in²

3. Area missed by wiper

A = ½r²θ = ½ × (6 in)² × θ = ½ × 36 in²× θ = 18 θ in ²

4. Area covered by wiper

A = 450 θ in² - 18 θ in² = 432 θ in²

5. Insert the value of θ

A = 432 × 25/36 π in² = 300π in² ≈ 942.5 in²

The area swept out by the wiper blade is 942.5 in².

6 0
4 years ago
The 7 in 7000 is how many times greater than the 7 in 70?
FrozenT [24]
Each 0 I believe is worth 10 times so 7000 is 30 times more greater.
4 0
3 years ago
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