Convert in scientific notation 0.0000000025

The scientific notation for that number is:

2.5 x 10^-9

2.5 X 10^-9

Let me know if this helps, or if you need me to explain how you get this answer, as its really simple and easy!

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.

don't report but were is the digram

step-by-step explanation: