The planet venus has a mass of 4.869 ∙ 1024 kilograms. use scientific notation to express the planet’s mass in milligrams. 1 kilogram = 1,000,000 milligrams

4.869 × 10³⁰ milligrams        

Step-by-step explanation:

A number written in scientific rotation is a number between 1 and 10 multiplied with the power of 10.

We know that

1 kilogram = 1,000,000 milligrams =1.0 × 10⁶ milligrams

4.869 × 10²⁴ kilograms can be written as:

4.869 × 10²⁴ × 1.0 × 10⁶ milligrams = 4.869 × 10³⁰ milligrams

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours

you first to choose the points and then move from then as the slope you have