Select the equivalent expression. \left(\dfrac{b^{7}}{4^{5}}\right)^{ -3}=?( 4 5 b 7 ​ ) −3 =?Left parenthesis, start fraction, b, start superscript, 7, end superscript, divided by, 4, start superscript, 5, end superscript, end fraction, right parenthesis, start superscript, minus, 3, end superscript, equals, question mark Choose 1 Choose 1 (Choice A) A \dfrac{b^{21}}{4^{15}} 4 15 b 21 ​ start fraction, b, start superscript, 21, end superscript, divided by, 4, start superscript, 15, end superscript, end fraction (Choice B) B \dfrac{4^{15}}{b^{21}} b 21 4 15 ​ start fraction, 4, start superscript, 15, end superscript, divided by, b, start superscript, 21, end superscript, end fraction (Choice C) C {b^{-21}}\cdot{4^{-15}}b −21 ⋅4 −15 b, start superscript, minus, 21, end superscript, dot, 4, start superscript, minus, 15, end superscript

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.

the answer is d

step-by-step explanation:

you can also use mathway to get you answer + steps

all you have to do is multiply them both to see how many out comes you can put:

3 x 2 = 6

you can make 6 diferent combinations of crusts and toppings.

~batmans wife dun dun

yes, gavin is right.

step-by-step explanation:

gavin is correct. 

this problem is about converting 9% per year to how many percent per quarter. the rate is still the same. it only differed in the time period. so, through dimensional analysis,

9% per year  × (1 year / 4 quarters) = 2.25% per quarter

if he was asked to convert 9% per year to how many percent per quarter  compounded quarterly, then you will not simply divide by four. this is because compounding is not linear.

hope this , have a good day. c;