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The owner of a van installs a rear$-$window lens that has a focal length of $-0\mathrm{.}290$ m $.$ When the owner looks out through the lens at an object located directly behind the van, the object appears to be $0\mathrm{.}250$ m from the back of the van, and appears to be $0\mathrm{.}390$ m tall. $($a$)$ How far from the van is the object actually located, and $($b$)$ how tall is the object?

$($a$)$ Number $$ Units $$

$($b$)$ Number $$ Units

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