Tobias downloads $m$ apps. Each app costs $\$ 2.00$ plus $10 \%$ tax. He spends $\$ 52.80$ in total on these $m$ apps. What is the value of $m$ ?
(A) 20
(B) 22
(C) 18
(D) 24
(E) 26
Since the tax rate is $10 \%$, then the tax on each $\$ 2.00$ app is $\$ 2.00 \times \frac{10}{100}=\$ 0.20$.

Therefore, including tax, each app costs $\$ 2.00+\$ 0.20=\$ 2.20$.

Since Tobias spends $\$ 52.80$ on apps, he downloads $\frac{\$ 52.80}{\$ 2.20}=24$ apps.

Therefore, $m=24$.

ANSWER: (D)