Question

Plzzz solve these asap.....! _/\_

Answer 1

Answer:

11)

Step-by-step explanation:

11)

a)

• ${3}^{ - 3} \times {( - 7)}^{ - 3 } = \frac{1}{ {3}^{3} } \times \frac{1}{ {( - 7)}^{3} }$

${( - 21)}^{3} = - 9261$

b)

${ \frac{1}{2} }^{ - 2} + { \frac{1}{3} }^{ - 2} + { \frac{1}{4} }^{ - 4}$

$= 4 + 9 + 256 = 269$

c)

$( {5}^{ - 1} \times {2}^{ - 1} ) \times {6}^{ - 1} = {60}^{ - 1} = \frac{1}{60}$

d)

$\frac{25 \times {p}^{ - 4} }{ {5}^{ - 3} \times 10 \times {p}^{ - 6} }$

$= \frac{25 \times 125}{10} \times {p}^{2} = {( \frac{25p}{ \sqrt{2} }) }^{2}$

11) Thickness of books = 6x30=180mm

Thickness of sheets = 5x0.015=0.075 mm

Total thickness of the stack =180.075 mm