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V125BC [204]
3 years ago
10

Help on question 5 please

Mathematics
1 answer:
Yakvenalex [24]3 years ago
7 0

Answer:

LM+MN=LN

3x-5+x+7=17

4x=17+5-7

4x=15

x=15/4=3.75

LM= 3x-5=3*3.75-5=6.25

Step-by-step explanation:

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If the basalt at the top of the ancient valley below Vulcan's Throne yields a radiometric date (K-Ar) of 15,000 years, and the l
zepelin [54]

Answer:

1.69\times 10^3feet/million year

Step-by-step explanation:

We are given that

Elevation of top of basalt in valley =4100 feet

Elevation of bottom of basalt in valley =2100 feet

Age of top of basalt in valley=15000 years

Age of bottom of basalt in valley=1.2 million years=1.2\times 10^6 years=1200000 years

We have to find the rate of basalt filling in the valley in feet per million yeas

Rate of basalt filling in the valley=\frac{Elevation\;of\;top\;of\;basalt\;in\;valley-elevation\;of\;bottom\;of\;basalt\;in\;valley}{age\;of\;bottom\;of\;basalt\;in\;valley-age\;of\;top\;of\;basalt\;in\;valley}

Rate of basalt filling in the valley=\frac{4100-2100}{1200000-15000}=\frac{2000}{1185000}=1.69\times 10^{-3} feet/year

Rate of basalt filling in the valley=1.69\times 10^{-3}\times 10^{6}=1.69\times 10^3feet/million year

6 0
4 years ago
Solve please 9 to the second power =97 . Is the awnser a rational number ?
Alinara [238K]

Answer:

yes becauss it can be expressed as a ratio

Step-by-step explanation:

4 0
3 years ago
Solve 9x-10÷2=x+9<br>explain how​
Mariulka [41]

Answer:

x = 4

Step-by-step explanation:

7 0
3 years ago
One gallon of paint covers 400 square feet of surface area. A typical spherical water tower holds 66,840.28 cubic feet of water.
enot [183]

Answer: There will enough to paint the outside of a typical spherical water tower.


Step-by-step explanation:

1. Solve for the radius r from the formula for calculate the volume of a sphere. as following:

V=\frac{4}{3}r^{3}\pi\\\frac{3V}{4\pi}=r^{3}\\r=\sqrt[3]{\frac{3V}{4\pi}}

2. Substitute values:

r=\sqrt[3]{\frac{3(66,840.28ft^{3})}{4\pi}}=25.17ft

3. Substitute the value of the radius into the equation fo calculate the surface area of a sphere, then you obtain that the surface area of a typical spherical water tower is:

SA=4r^{2}\pi\\SA=4(25.17ft)^{2} \pi\\SA=7,964.95ft^{2}

3. If a city has 25 gallons of paint available and one gallon of paint covers 400 square feet of surface area, you must multiply 25 by 400 square feet to know if there will be enough to paint the outside of a typical spherical water tower.

25*400ft^{2}=10,000ft^{2}

As you can see, there will enough to paint the outside of a typical spherical water tower.

7 0
3 years ago
❗️❗️Pleaseeee helpppp❗️❗️
inysia [295]
Oma made a mistake in step B, because she should have divided both sides by b instead of just moving it to the other side. The real next step would look like:
(2A)/b=h
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