Mass of Mars is 6.42 × 10²⁹ kg and mass of the Sun is 1.99 × 10³⁰ kg. What is the total mass?

State whether the given statements are true (T)or false (F).

329.25 = 3 × 10² + 2 × 101 + 9 × 10⁰ + 2 × 10^–1 + 5 × 10^–2

The paper clip below has the indicated length. What is the length in standard form.

There are 864,00 seconds in a day. How many days long is a second?

Express your answer in scientific notation.

Find the value of n.

Solve:

At the end of the 20th century, the world population was approximately 6.1 × 10⁹ people. Express this population in usual form. How would you say this number in words?

The number of red blood cells per cubic millimetre of blood is approximately 5.5 million. If the average body contains 5 litres of blood, what is the total number of red cells in the body? Write the standard form. (1 litre = 1,00,000 mm3)

Astronomy The table shows the mass of the planets, the sun and the moon in our solar system.

A. Write the mass of each planet and the Moon in scientific notation.

B. Order the planets and the moon by mass, from least to greatest.

C. Which planet has about the same mass as earth?

The left column of the chart lists the lengths of input pieces of ribbon. Stretching machines are listed across the top. The other entries are the the outputs for sending the input ribbon from that row through the machine from that column. Copy and complete the chart.

The left column of the chart lists the lengths of input chains of gold. Repeater machines are listed across the top. The other entries are the outputs you get when you send the input chain from that row through the repeater machine from that column. Copy and complete the chart.