Switch Define the macro switch, which takes in an expression expr and a list of pairs, cases, where the first element of the pair is some value and the second element is a single expression. switch will evaluate the expression contained in the list of cases that corresponds to the value that expr evaluates to. scm> (switch ( 1 1) ((1 (print 'a)) (2 (print 'b)) (3 (print 'c b You may assume that the value expr evaluates to is always the first element of one of the pairs in cases. You can also assume that the first value of each pair in cases is a value. (define-macro (switch expr cases) (cons (map ( () (cons (cdr case))) cases)) )

Signal sets company contracts to deliver one hundred 52-inch plasma high-definition television sets to a new retail customer, tuner tv store, on may 1, with payment to be made on delivery. signal tenders delivery in its own truck. tuner's manager notices that some of the cartons have scrape marks. tuner's owner phones signal's office and asks whether the sets might have been damaged as they were being loaded. signal assures tuner that the sets are in perfect condition. tuner tenders signal a check, which signal refuses, claiming that the first delivery to new customers is always for cash. tuner promises to pay the cash within two days. signal leaves the sets with tuner, which stores them in its warehouse pending its "grand opening sale" on may 15. two days later, tuner's stocker opens some of the cartons and discovers that a number of the sets are damaged beyond ordinary repair. signal claims tuner has accepted the sets and is in breach by not paying on delivery. will signal succeed on these claims? explain.

Which group on the home tab allows you to add shapes to a powerpoint slide?

What are the steps involved in accepting all the changes in a document? arrange these in order click edit. click accept or reject. click changes. click accept all.