Hey there!
• Original problem/equation
28 * 0.64
= 17.92
• Estimated to the nearest tens & tenths
= 30 * 0.60
= 18
The best estimation for the original equation is: 18 but we rounded to find the answer with tens & tenths place
Out of your answer choices that you have provided we can say “Option C. 21” could possibly be your answer
Good luck on your assignment and enjoy your day!
~Amphitrite1040:)