3 years ago

Please someone help me please :(

1 answer:

6 0

C = 19.99 + 0.15x

1️⃣ C = 0.15(78) + 19.99

2️⃣ C = 11.7 + 19.99

3️⃣ C = 31.69

4️⃣ The total cost is $31.69

5️⃣ The cost to send 78 text messages is $11.70

♡´･ᴗ･`♡Brainliest Please♡´･ᴗ･`♡

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We must find the radius so we can plug this into the formula for surface area.

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