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qwelly [4]
2 years ago
13

On a recent survey, 60% of those surveyed indicated that they preferred hamburgers over pizza? 

Mathematics
2 answers:
Elina [12.6K]2 years ago
8 0
900 people preferred hamburgers.
julia-pushkina [17]2 years ago
5 0

540/x=60/100

cross multiply

60x=54,000 then

60x/60=54,000/60

x=900

so 900 people preferred hamburger

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The decay of 192 mg of an isotope is given by A(t)= 192e-0.015t, where t is time in years. Find the amount left after 55 years.
statuscvo [17]

Answer:

This is a typical radioactive decay problem which uses the general form:

A = A0e^(-kt)

So, in the given equation, A0 = 192 and k = 0.015. We are to find the amount of substance left after t = 55 years. That would be represented by A. The solution is as follows:

A = 192e^(-0.015*55)

A = 84 mg

6 0
1 year ago
terrence made a sphere out of modeling clay. the sphere had a radius of 2 inches. approximately how much modeling clay did terre
navik [9.2K]

Amount of clay used = volume of the sphere

It is given that the radius of the sphere is 2 inches.

Volume of the sphere = \frac{4}{3} \pi r^{3}

=\frac{4}{3} \pi (2^{3} )

=\frac{4}{3} \pi (8)

=\frac{32}{3} \pi

Hence, the amount of modeling clay Terrence used =\frac{32}{3} \pi cubic inches.


5 0
2 years ago
Can I have help on this question, please?
Setler [38]

Answer:

p(a)=3/4

p(b)=3/4

p(a and b)=1/2

not independent

6 0
2 years ago
Read 2 more answers
Estimate the value of 9.9 squared x 1.79
Helen [10]
9.9^2X1.79
9.9^2=98.01
98.01X1.79=175.4379
7 0
2 years ago
Read 2 more answers
The present age of nitin is two times the present age of his sister pooja. After 7 years their ages will add to 68 years. Find t
svlad2 [7]
N=2p

(n+7) + (p+7) = 68

2p + 7 + p + 7 = 68

3p + 14 = 68

3p = 68 - 14 = 54

p=54/3=18

n=2p=36

Check: (18+7)+(36+7)=25+43=68  good



7 0
2 years ago
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