Answer:
b = 9.9
Step-by-step explanation:
a² + b² = c²
Fill in the variables we know:
1² + b² = 10²
1 + b² = 100
Subtract 1 from both sides:
1 - 1 + b² = 100 - 1
b² = 99
Square root both sides to get 'b' by itself:
√b² = √99
b = 9.94987437
Round to nearest tenth:
b = 9.9
