Answer:
 Standard Rate = $ 5.65
Explanation:
Wolfen Company
Actual direct labor rate $5.00 
Standard direct labor hours allowed 11,000 
Actual direct labor hours 10,000 
Direct labor rate favorable $6,500
Using formula to find the unknown figure 
Direct Labor Rate variance =   Actual Hours ( Standard Rate-Actual Rate)
$6,500= 10,000( Standard Rate-5)
$6,500/10,000 =  (Standard Rate-5)
0.65+ 5=Standard Rate
 Standard Rate=5+0.65= $ 5.65
We can check by putting it in another formula 
Direct Labor Rate variance=  (actual hours * standard rate)-(actual hours* actual rate)
$6,500=(10,000*Standard Rate)-( 10,000 *5.0) 
$6,500= (10,000*5.65)-( 10,000 *5.0) 
$6,500= (56,500)-( 50,000 ) 
$6,500=$6,500  (favorable) when standard price is higher than actual price