D. last year, mr. petersen was able to plant 4 rows of carrots with 13 plants in each row. this year, he
plans to plant twice as many rows with twice as many carrot plants in each. how many carrot plants
will he plant this year? write a multiplication equation to solve. assess the reasonableness of your
answer.

4(2)= 8 rows
13(2)= 26 plants each

(8)(26)=208 plants.
If there were 4 rows the first year and 13 plants coming from each row, and it’s being doubled the second year then 4 would become 8 and 13 would become 26. Afterwards, you would need to multiply the rows (8) by the plants coming from each row (26) and that give you your total amount of plants (208).

x = 42

Step-by-step explanation:

100 + 38 + x = 180

138 + x = 180

-138 -138

x = 42

hope this helps