257487254877
scientific notation

2.57487254877 ×

To write a number in scientific notation, first write a decimal point in the number so that there is only 1 digit to the left of the decimal point.

Next, count the number of places the decimal point would need to move to get back to the original number.

The exponent is positive because we would need to move the decimal point to the right to get back to our original number.

Image provided.

cant without the picture! ?

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west