Write the following numbers in standard form. Reminder: You may have to add a 0 as a placeholder in some cases.

Example: [tex]$7000 + 40 + 2 = 7042$[/tex]

a. [tex]$50000000 + 20000 + 700 + 1 = 50271701$[/tex]

b. [tex]$60000 + 8000 + 400 + 50 + 9 = 68459$[/tex]

c. [tex]$400000 + 10000 + 60 + 8 = 410068$[/tex]

d. [tex]$3000000000 + 200000000 + 5000000 + 70 + 3 =$[/tex]

Sure, I'd be happy to help you understand how to write these numbers in standard form. Here’s a detailed step-by-step guide:

### Question:
Write the following numbers in standard form.

#### Parts:
a. [tex]$50000000 + 20000 + 700 + 1$[/tex]
b. [tex]$60000 + 8000 + 400 + 50 + 9$[/tex]
c. [tex]$400000 + 10000 + 60 + 8$[/tex]
d. [tex]$3000000000 + 200000000 + 5000000 + 70 + 3$[/tex]

### Solution:

#### Part a:
[tex]\[50000000 + 20000 + 700 + 1\][/tex]

To write this in standard form, we add all the components together:
[tex]\[50000000 + 20000 + 700 + 1 = 50020701\][/tex]

So, the standard form is:
[tex]\[ \boxed{50020701} \][/tex]

#### Part b:
[tex]\[60000 + 8000 + 400 + 50 + 9\][/tex]

To write this in standard form, we add all the components together:
[tex]\[60000 + 8000 + 400 + 50 + 9 = 68459\][/tex]

So, the standard form is:
[tex]\[ \boxed{68459} \][/tex]

#### Part c:
[tex]\[400000 + 10000 + 60 + 8\][/tex]

To write this in standard form, we add all the components together:
[tex]\[400000 + 10000 + 60 + 8 = 410068\][/tex]

So, the standard form is:
[tex]\[ \boxed{410068} \][/tex]

#### Part d:
[tex]\[3000000000 + 200000000 + 5000000 + 70 + 3\][/tex]

To write this in standard form, we add all the components together:
[tex]\[3000000000 + 200000000 + 5000000 + 70 + 3 = 3205000073\][/tex]

So, the standard form is:
[tex]\[ \boxed{3205000073} \][/tex]

By following these steps and adding the components for each part, we get the final standard forms for all the given numbers.