I really need help 50 POINTS AND WILL BE MARKED BRAINLIEST
ONLY if your answer shows steps and is logical
If it is obviously incorrect, it will be reported

a. Find the domain and range of f(x)=2log_3(x^2-4x-5)

b. find the domain and range of the function f(x)=5/(2+3^x)

c. If 8^x=27, then what is 4^(2x-3)

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.

answer: the sun

explanation:

water cycle describes the evaporation of water from earth's surface, formation of clouds and precipitation water back onto the surface of earth. seventy percent of the earth is covered with water in the form of seas and oceans. the heat of the sun causes the evaporation of water from the surface of the ocean. the water vapors rise and condense to form water droplets. the collection of these water droplets form clouds which rain down again.

the evaporation of the oceans surface water as part of the water cycle is caused by the sun

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step-by-step explanation:

нσρє ι ¢συℓ∂ нєℓρ!

the answer is b because it has ^2 and the rest do not.

step-by-step explanation: