Ineed some with these keep in mind when answering that these questions are about "reading scientific notation"

1. 0.0000000385

2. 2,100

3. 0.00027

4. 0.008

5. 5,600,000,000,000

Step-by-step explanation:

To convert from scientific notation to decimal form, simply move the decimal point to the right, if the exponent is positive, or to the left, if the exponent is negative, the amount of spaces equal to the exponent .

7.9m and 4.3°

step-by-step explanation:

let east be +x and north be +y, x = distance * cos θ, y = distance * sin θ  

for 3.5 south, y = -3.5  

for 8.2, x = 8.2 * cos 30 and y = 8.2 * sin 30  

for 15 west, x = -15  

total x = 8.2 * cos 30 – 15 ≈ -7.9  

total y = -3.5 + 8.2 * sin 30 = 0.6  

magnitude = [(8.2 * cos 30 – 15)^2 + 0.6^2)]^0.5  

the magnitude is approximately 7.9 m  

tan θ = y/x = 0.6/-7.9  

the angle is approximately 4.3˚ north of west

n=1.75+1.75

step-by-step explanation:

3.5/2=1.75