Solve the problem.
-A formula for the focal length of a lens is $\mathrm { f } = \frac { \mathrm { ab } } { \mathrm { b } + \mathrm { a } }$. Calculate $\mathrm { f }$ (the focal length) for $a = 10 \mathrm {~cm}$ and $\mathrm { b } = 6 \mathrm {~cm}$. Round to the nearest tenth.
A) $3.8 \mathrm {~cm}$
B) $3.0 \mathrm {~cm}$
C) $6.3 \mathrm {~cm}$
D) $5.0 \mathrm {~cm}$

Question

Quizplus · Accepted Answer

The Answer of Solve the problem.
-A formula for the focal length of a lens is $\mathrm { f } = \frac { \mathrm { ab } } { \mathrm { b } + \mathrm { a } }$. Calculate $\mathrm { f }$ (the focal length) for $a = 10 \mathrm {~cm}$ and $\mathrm { b } = 6 \mathrm {~cm}$. Round to the nearest tenth.
A) $3.8 \mathrm {~cm}$
B) $3.0 \mathrm {~cm}$
C) $6.3 \mathrm {~cm}$
D) $5.0 \mathrm {~cm}$

Solve the Problem f=abb+a\mathrm { f } = \frac { \mathrm { ab } } { \mathrm { b } + \mathrm { a } }f=b+aab​

Solve the Problem $\mathrm { f } = \frac { \mathrm { ab } } { \mathrm { b } + \mathrm { a } }$