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Brilliant_brown [7]

4 years ago

15

a first class postage stamp was $0.02 in 1885. the same first class postage stamp in 2006 was $0.39. what is the percent of incr

ease in the cost of a first class postage stamp?

1 answer:

Eddi Din [679]4 years ago

5 0

The price was increased by $0.37 just subtract

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A 5ft 11-inch women cast a three ft shadow. what is the angle that the sun's rays make with the ground?

zepelin [54]

This will involve finding an arctangent.
We'll consider the woman's height as the "opposite" side of a triangle and the shadow as the "adjacent" side. The angle that the Sun makes equals the arc tangent of that angle.
tan (Sun's angle) = 71" / 36"
tan (Sun's angle) = <span> <span> <span> 1.9722222222 </span> </span> </span>
when we determine the arc tangent of 1.9722222222, it will equal the Sun's angle.
arc tangent of 1.9722222222 = 63.113 degrees

4 0

3 years ago

Before the industrial revolution in 1800 the concentration of carbon in Earth’s atmo- sphere was 280 ppm. The concentration in 2

slega [8]

Answer: There is increase of 4.255 in the amount of carbon in the atmosphere.

Step-by-step explanation:

Since we have given that

Concentration of carbon in Earth's atmosphere in 1800 = 280 ppm

Concentration of carbon in Earth's atmosphere in 2015 = 399 ppm

We need to find the percentage increase in the amount of carbon in the atmosphere.

So, Difference = 399-280 = 119 ppm

so, percentage increase in the amount of carbon is given by

$\dfrac{Difference}{Original}\times 100\\\\=\dfrac{119}{280}\times 100\\\\=\dfrac{11900}{280}\\\\=42.5\%$

Hence, there is increase of 4.255 in the amount of carbon in the atmosphere.

4 0

3 years ago

Help i dont know the formula for the triangle to find the answer its surface area n volume

777dan777 [17]

Answer:

#4=10.5

#5=48

Step-by-step explanation:

The formula for the triangle for area is 1/2 time base times hight

The forumale fot the triangle for volume is 1/2 time base times hight

So for number #4 it will be 1/2 x 3 x 7

and number #5, it will be 1/2 x 8 x 12

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3 years ago

PLZ HELP ASAP WORTH 20 POINTS

sleet_krkn [62]

3 times 10 equal 30 3*10

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3 years ago

Read 2 more answers

If city A is 32% less than city b what is city A population

leonid [27]

Answer:

there is definitely missing context in this question but if we are going off of per say 100% then A is 68%

Step-by-step explanation:

3 0

3 years ago