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ELEN [110]
3 years ago
11

Please help with 19 and 20 and explain

Mathematics
2 answers:
Verizon [17]3 years ago
4 0
It should be 15 and 8.6
Talja [164]3 years ago
3 0
The answer is 15 and 8.6
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Scientists predict that there is a 0.8 chance that there will be an earthquake in San Francisco this year. How likely is that th
Firlakuza [10]

Answer:

80%

Step-by-step explanation:

8 0
3 years ago
What is 2/9 divided by 3?
Kryger [21]
((2÷9))÷3
(0.222)÷3
=0.074
3 0
3 years ago
Please help Anyone I'm seriously almost done​
sp2606 [1]

Answer:

\textsf{x = 45}

Here, the given 2 angles are complementary angles. The sum is <u>90 degrees</u> as indicated by the right angle symbol.

\textsf {Solving :}

\implies \textsf{x - 2 + 47 = 90}

\implies \textsf{x + 45 = 90}

\implies \textsf{x = 45}

5 0
2 years ago
Use Hooke's Law to determine the work done by the variable force in the spring problem. A force of 450 newtons stretches a sprin
vlada-n [284]

Answer:

The work done is 202.50Nm

Step-by-step explanation:

Given

F =450N

x_1 = 30cm

x_2 = 60cm

Required

The work done

First, we calculate the spring constant (k)

F = kx_1

450N = k *30cm

k = \frac{450N}{30cm}

k =15N/cm

So:

F = kx_1

F(x) = 15x

The work done using Hooke's law is:

W =\int\limits^a_b {F(x)} \, dx

This gives:

W =\int\limits^{60}_{30} {15x} \, dx

Rewrite as:

W =15\int\limits^{60}_{30} {x} \, dx

Integrate

W =15 \frac{x^2}{2}|\limits^{60}_{30}

This gives:

W =15 *\frac{60^2 - 30^2}{2}

W =15 *\frac{2700}{2}

W =15 *1350

W =20250N-cm

Convert to Nm

W =\frac{20250Nm}{100}

W =202.50Nm

7 0
3 years ago
Simplify the ratio 0.08:0.12
mr Goodwill [35]

0.08:0.12\\\\0.08\cdot100=8\\0.12\cdot100=12\\\\0.08:0.12\to8:12\\\\8:4=2\\12:4=3\\\\0.08:0.12\to8:12\to2:3

4 0
3 years ago
Read 2 more answers
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