Answer:
Number of bonds to raise = 2250
Explanation:
given data 
current financed = 100% equity
common stock outstanding = 100,000 shares
selling = $50 per share
debt = 45%
equity =55%
par value of a bond = $1,000
to find out 
How many bonds would Don have to sell at par value
solution
we get here first the value of equity that is express as 
value of equity = Number of shares × Price per share .................1
put here value 
value of equity = 100,000 × $50 
value of equity = $5,000,000
and 
financed with bonds = 45 % of value of equity
financed with bonds = 45 % × $5,000,000
financed with bonds = $2,250,000
so 
Number of bonds to raise is express as 
Number of bonds to raise = 
Number of bonds to raise = 2250