cho hình thang vuông ABCD có đáy lớn AB=4a, đáy nhỏ CD=2a,đường cao AD=3a, I là trung điểm của AD . Khi đó (vecto IA+vecto IB)vectoID bằng

it is a reproduction.

step-by-step explanation:

the answer is:

the correct option:

b.

to solve the problem, we need to remember how to operate to simplify exponential expressions using the logarithms.

we are given the equation:

then, using placing logarith with base 7 on both sides of the equation, we have:

so, rounding the obtained result to two decimal places (nearest hundreth), we have:

hence, we have that the correct option:

b.

have a nice day!

-3.5 is the distance.

i've had this question so choose the one in the absolute value sign.