15638 three different way to write using only hundreds tens and ones

150 hundreds, 63 tens and 8 ones

141 hundreds, 161 tens and 28 ones

156 hundreds, 3 tens and 8 ones

Step-by-step explanation:

we can write the numbers in thousands, hundreds, tens and ones  by using the place values.

The number 15,638 can be written in three different ways as:

150 hundreds, 63 tens and 8 ones  =  15638

141 hundreds, 161 tens and 28 ones =  15638

156 hundreds, 3 tens and 8 ones = 15638.

We use the digits from 0 to 9 with place value concept

529 and 531

step-by-step explanation:

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places