Page 115 - Maths Skills - 7

Exponents and Powers 113

INTEGRATED QUESTION

G. Social Science Vs Maths
1. The distances of many cities from Delhi are given in the table below. Write the distance in exponent and
power format.

City Distance (km) Distance (km) in Exponent and Power format (Exponential Form)

Agra 256

Meerut 81

Kolkata 2401

Prayagraj 729

Thiruvananthpuram 6561

2. The table shows the average distance from each planet in our solar system to the sun. Write the distance of
the given planets from the sun in standard notation.

Planet Distance from Sun (km) Standard Notation

Earth 149600000

Jupiter 778300000

Mars 227900000

Venus 108200000

Saturn 1427000000

HOTS

1. Write 25 × 25 × 25 × 25 × 25 in exponential form with base 5.
4
5
2
3
3
a  4 0   2  b  7
− 
2. If b =   3  ÷   then evaluate   and write the answer in exponential form.
5

a 

 
3. Write the number 0.00000123456 × 10 in the usual form as an ordinary number and then convert it into
10
expanded form.
4. A star in the Milky Way galaxy is 7 × 10 light years away from the earth and a light year is approximately
4
5.8 × 10 miles. Find out in scientific form the distance of the star from the Earth in miles.
12
Word Stock
Integer Exponent Reciprocal Evaluate Simplify Base Product