the average human body cell is about 5.1 x 10^-4 cm in diameter. the diameter of a plant cell is 8 x 10^-3 cm.
what is the combined diameter of the body cell and plant cell?

Step-by-step explanation:

In order to add or subtract numbers in scientific notation, the powers of ten must have the same exponent.  In this caes the diameter of an average human body cell is a power of -4 and the diameter of a plant cell is a power of -3.  In order to add them, we can move the decimal over for the body cell diameter:

Add the two values:

8.51×10^-3 cm

Step-by-step explanation:

Hope this helps :)

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

here is your mark brainliest