How we write this number scientific notation 4.2x10^-5

0.0042

Step-by-step explanation: The number shown here, , is written in scientific notation since it's compose of a decimal between 1 and 10, in this case 4.2, and a power of ten, in this case .

To write in standard notation, we first begin with 4.2.

Next, we look at the exponent, which in this case is -5.

A negative exponent means that we move the decimal point to the left.

This gives us .000042 or 0.000042.

b

step-by-step explanation:

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: