If m represents the mass of the substance and trepresents the elapsed time in years, then which of the following systems of equations can be used to determine how long it will be before the substances have an equal mass? a. m = 300e-0.0156 m = 500e-0.097 b. m = 3000.00156 m = 500e0.00374 c. m = 3000.00015 m = 5000.00037 d. m = 300e -0.00157 m = 500e-0.0037

she drove 134 miles

step-by-step explanation:

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

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