Abiologist wants to determine the effect of a new fertilizer on tomato plants. what would be the treatment?
a. tomatoes
b. plants
c. fertilizer
d. plant growth

D. Plant growth

Explanation:

An independent variable is the one which can be changed or manipulated in a given experiment. The effect of such change can be observed on the dependent variable. A dependent variable is the one which cannot be changed or manipulated manually. The changes occurring in the dependent variable can be observed to deduce the outcome of the experiment.

According to the given situation, a new fertilizer is the example of the independent variable the effect of which can be observed on the plant growth which is a dependent variable.

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

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