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Mathematics 22 Online
OpenStudy (anonymous):

the base of A triangle is.....

OpenStudy (anonymous):

OpenStudy (danjs):

Do you remember how to find the area of a triangle

OpenStudy (anonymous):

kinda

OpenStudy (danjs):

Area of a triangle = (1/2) x Base x Height

OpenStudy (anonymous):

i think the answer is c

OpenStudy (danjs):

oh, i dont know what the answer is yet

OpenStudy (anonymous):

ok

OpenStudy (danjs):

\[\frac{ 1 }{ 2}*\frac{ 29^{14} }{ 5^{11} } = \frac{ 1 }{ 2 }*\frac{ 29^4*5^8 }{ 1 } *h\]

OpenStudy (danjs):

see all i did was replace area and base with the numbers in Area= 1/2 base times height letting h = height

OpenStudy (danjs):

If you multiply both sides of that equation, by 2, both the 1/2 fractions dissapear

OpenStudy (danjs):

\[\frac{ 29^{14} }{ 5^{11} } = \frac{ 29^4*5^8 }{ 1 } *h\]

OpenStudy (danjs):

You need h to be a number , so that you end up with 5^11 on the bottom , and 29^14 on the top, are you familiar with the exponent rules?

OpenStudy (anonymous):

not really I'm sorry i did them a year ago

OpenStudy (danjs):

You need to figure this out: \[\frac{ 5^8 }{ 5^a } = 5^{11}\]

OpenStudy (anonymous):

was my answer correct?

OpenStudy (danjs):

The rule is....\[\frac{ 5^8 }{ 5^a } = 5^{8-a} \]

OpenStudy (danjs):

so 8 - a = 11 a = 3 the denominator of h will be 5^3

OpenStudy (anonymous):

hmm I go with B

OpenStudy (anonymous):

you were wrong both

OpenStudy (anonymous):

it was d

OpenStudy (danjs):

it says the area of a rectangle, that will be double the area of a triangle, so you need to divide that given area in half to begin with

OpenStudy (anonymous):

ok well it was wrong :/ but thanks anyway

OpenStudy (danjs):

do you want me to explain it all to you, exponent rules, area of triangle, area of rectangle and how to solve for the height of the triangle?

OpenStudy (anonymous):

i markeed u best because of your time

OpenStudy (danjs):

I didn't read rectangle, you have to divide the given area in half first before you do anything

OpenStudy (anonymous):

sure

OpenStudy (anonymous):

its d then ?

OpenStudy (anonymous):

yes @abram134

OpenStudy (danjs):

|dw:1420603092871:dw|

OpenStudy (anonymous):

ok

OpenStudy (danjs):

That given area is equal to the given base times the height we need to find

OpenStudy (anonymous):

ok

OpenStudy (danjs):

\[\frac{ 29^{14} }{ 2*5^{11} } = 29^4*5^8*h\]

OpenStudy (danjs):

good on that part?

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