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Aleks [24]
2 years ago
14

Hi can anybody help thx!

Mathematics
1 answer:
aksik [14]2 years ago
8 0

Answer:

Volume of air = 120 m³

Mass of air = 156 kg

Step-by-step explanation:

Volume of air in a lab of dimensions,

= 8 x 5 x 3

= 120 m³

Mass of the air ?

Given : Density of air = 1.3 kg/m³

Formula : -

Density = Mass / Volume

Mass = Density x Volume

= 1.3 x 120

Mass = 156 kg

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Rene made a 90 % on her math test. If she answered 20 problems correctly , how many problems were on the test ?
MakcuM [25]

Answer:

Rene made = 90 on her math test

If she answer =20problems correctly

we know,

how many problem were there = ?

there where = 90-20

= 70

There where 70 problems

8 0
2 years ago
Evaluate y(-3) - 7x<br> When x = 8, y = 2
VLD [36.1K]

Answer:

The answer to the question provided is -62.

6 0
2 years ago
Kendra flips a fair coin two times. What is the probability that she will flip tails both times?
wolverine [178]

Answer: 1/4 or 25%

Step-by-step explanation:

The chance of flipping tails is 1/2, so you multiply 1/2*1/2 (for the 2 flips) to get 1/4 (1/2^2=1/4).

4 0
2 years ago
The commuter trains on the Red Line for the Regional Transit Authority (RTA) in Cleveland, OH, have a waiting time during peak r
eduard

Answer:

a) height of this uniform distribution = 1/8 = 0.125.

b) P( 4 < x < 5) = (5 - 4)*0.125 = 0.125

c) P( 3 < x < 8) = (8 - 3)*0.125 = 0.625

d) P(x = 0) = 0*0.125 = 0

Step-by-step explanation:

Height of this uniform distribution is same as finding the probability for each waiting minutes.

Height of uniform distribution = 1/n. Where n is the number of occurence, in this n = 8.

a) height of this uniform distribution = 1/8 = 0.125.

Let random variable x = waiting time.

b) probability of waiting between four and five minutes

P( 4 < x < 5) = (5 - 4)*0.125 = 0.125

c) probability of waiting between three and eight minutes

P( 3 < x < 8) = (8 - 3)*0.125 = 0.625

d) probability of waiting five minutes exactly.

Since this would be just one line, and the width of the line is 0, then the

P(x = 0) = 0*0.125 = 0

8 0
3 years ago
Karla bought 2 pounds of red beads , 1 3/4 pounds of green beads , and 10 ounces of string at the craft store. How much do Karla
elixir [45]
12 ounces are in 3/4 a pound.. and 16 ounces are in a pound.. so adding 16 and 10 gives you 26, which ends up with Karla's supplies weighing 4 pounds and 10 ounces all together.
4 0
3 years ago
Read 2 more answers
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