Category: science homework help

117) Larry’s Fish Market buys salmon (S) for $5 per pound and a local whitefish (W) for $3.50 per pound. Larry wants to minimize his cost, but he cannot spend more than $160. The objective function that minimizes these costs for Larry is:

A) 5S + 3.5W ≤ 160

B) Min 5S + 3.5 W

C) Max 5S + 3.5 W

D) Min 5S + 3.5W ≥ 160

109) A technique that assumes certainty in its solution is referred to as

A) stochastic.

B) probabilistic.

C) deterministic.

D) parametric.

(2) In a two stage chemostat system, the volumes of the first and second reactors are V1 = 500L and V2 = 300L, respectively.

The first reactor is used for biomass production and the second is used for a secondary metabolite formation.
•The feed flow rate to the first is F = 100L/h and
•the glucose concentration in the feed is So= 5.0 g/L,
•µmax = 0.3 h-1,
•Ks = 0.1 g/l and
•YX/S = 0.4 gdw cells /g glucose.

(a) Determine cell and glucose concentration in the effluent of the first stage.

(b) Assume that growth is negligible in the second stage and the specific rate of product formation is q_P = 0.02g P/g cell h, and Y_(P/s)= 0.6 g P/g S. Determine the product and substrate concentration in the effluent of the second reactor.

Current focus on children’s mental health includes each of the following EXCEPT:

A. increasing awareness of childhood mental illness.

B. reducing the stigma of mental disorders.

C. strengthening the mental health evaluation and treatment of mental disorders.

D. mandating parent education for children with mental disorders. Reset Selection

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It is important for teachers to choose foods that match children’s ability to chew because:

A. the start of digestive action takes place when foods are chewed.

B. this reduces the risk of choking.

C. taste buds work more affectively when food is chewed.

D. chewing is essential for saliva production. Reset Selection

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